Illinois Well Drillers Directory
Every company that appears as the driller of record in the Illinois State Geological Survey water well records, ranked by the number of wells they have drilled. 823 Illinois drilling companies account for 283,405 logged wells. Each profile shows the counties a company works, its well characteristics, and links to its original drilling logs — all drawn directly from the state record.
823drilling companies
69active since 2022
283,405wells on record
Companies with at least 25 wells on record. "Active" counts wells completed since 2022.
| # | Company | Wells | Since 2022 | Counties | Most recent |
|---|---|---|---|---|---|
| 1 | Huemann, Joseph J. | 4,656 | 226 | 6 | 2024-06-18 |
| 2 | Wagenbach, Mark | 304 | 141 | 12 | 2024-06-18 |
| 3 | Albrecht, Harold Dean | 1,157 | 119 | 27 | 2024-06-07 |
| 4 | Knierim, Ken/K & K Well Drlg. | 891 | 117 | 13 | 2024-06-06 |
| 5 | Tracy A Mcconnel | 170 | 87 | 21 | 2024-05-03 |
| 6 | Dragovich, Mark G. | 321 | 86 | 5 | 2023-11-16 |
| 7 | Layten, Mark J. | 320 | 75 | 19 | 2024-01-05 |
| 8 | Allen, Joseph | 792 | 72 | 17 | 2024-09-10 |
| 9 | Liberg, Steve Jr. | 706 | 72 | 16 | 2023-09-10 |
| 10 | Brad Snelten | 149 | 68 | 4 | 2024-07-02 |
| 11 | Reiners, Lynn | 680 | 63 | 6 | 2023-11-22 |
| 12 | Findlay Bros. Well Drilling | 323 | 61 | 10 | 2024-05-29 |
| 13 | Jason Jablonski | 89 | 55 | 9 | 2024-05-14 |
| 14 | Beanland, Ronald D. | 1,485 | 54 | 15 | 2022-09-06 |
| 15 | Davinroy, Mark | 100 | 54 | 2 | 2022-08-05 |
| 16 | Haake, Ralph | 903 | 53 | 28 | 2022-12-20 |
| 17 | Beanland, Glen | 725 | 51 | 15 | 2024-05-20 |
| 18 | Tyler J. Gee | 146 | 51 | 5 | 2024-05-07 |
| 19 | Harry T Waters | 91 | 50 | 17 | 2024-07-11 |
| 20 | Keller, Larry | 939 | 46 | 9 | 2024-04-24 |
| 21 | Binz, David Joseph | 984 | 44 | 5 | 2024-04-12 |
| 22 | Kelly, Timothy | 78 | 43 | 24 | 2024-09-13 |
| 23 | Strange, Michael | 1,024 | 41 | 9 | 2024-05-10 |
| 24 | Skinner, Todd | 572 | 41 | 24 | 2024-04-15 |
| 25 | Greg Tarter | 81 | 38 | 4 | 2023-10-18 |
| 26 | Stoll, Austen | 156 | 36 | 11 | 2023-12-07 |
| 27 | Stinnett, David | 1,830 | 35 | 11 | 2023-11-20 |
| 28 | Durbin, Dominique | 109 | 35 | 19 | 2024-02-20 |
| 29 | Gebke, Randy | 97 | 35 | 16 | 2022-12-21 |
| 30 | Harvey, Lucius | 34 | 34 | 4 | 2024-05-28 |
| 31 | Ray Mueller | 33 | 33 | 7 | 2024-02-13 |
| 32 | White, Matt | 334 | 32 | 8 | 2022-12-13 |
| 33 | Schmalfeldt, Todd | 200 | 32 | 11 | 2022-10-08 |
| 34 | Gelement, Val | 95 | 32 | 9 | 2023-12-13 |
| 35 | Roop, Randy/Jonas Martin Drlg. | 393 | 31 | 9 | 2024-01-03 |
| 36 | Neely, Mark S. | 1,105 | 29 | 11 | 2024-02-02 |
| 37 | Smith, Allen E. | 310 | 28 | 9 | 2024-01-24 |
| 38 | Bull Well Drilling Inc. | 78 | 27 | 6 | 2023-10-24 |
| 39 | Harper, David | 347 | 26 | 3 | 2023-06-01 |
| 40 | Martin, Charles | 130 | 26 | 4 | 2024-01-05 |
| 41 | Scates, Stephen T. | 75 | 26 | 7 | 2023-11-15 |
| 42 | Matt Liberg | 182 | 25 | 11 | 2023-09-26 |
| 43 | Municipal Well & Pump, Inc. | 56 | 25 | 17 | 2026-01-05 |
| 44 | Thompson, John | 88 | 24 | 3 | 2023-12-06 |
| 45 | Beanland, Leonard Ralph | 1,179 | 23 | 15 | 2023-10-19 |
| 46 | Parrott, Cody | 174 | 20 | 11 | 2023-10-26 |
| 47 | Harriss, Chuck | 72 | 20 | 9 | 2024-03-22 |
| 48 | Greenfield, Edward K. | 867 | 18 | 28 | 2024-06-10 |
| 49 | Area Well & Pump | 792 | 18 | 9 | 2023-01-16 |
| 50 | Gregory Horman | 34 | 18 | 5 | 2024-02-23 |
| 51 | Greg A. Evans | 115 | 17 | 24 | 2024-02-09 |
| 52 | Will County Well & Pump | 832 | 16 | 13 | 2023-11-03 |
| 53 | Gingerich, Corwin | 331 | 15 | 21 | 2023-09-19 |
| 54 | Berg Well & Pump | 551 | 13 | 15 | 2023-11-30 |
| 55 | S & J Well Drilling | 511 | 13 | 15 | 2023-11-13 |
| 56 | Michael C. Richards | 59 | 13 | 3 | 2023-07-22 |
| 57 | Danner, James | 57 | 12 | 4 | 2023-04-11 |
| 58 | Beck, Harold F. Jr. | 1,230 | 11 | 10 | 2023-03-04 |
| 59 | Dohrman, Dale Raymond | 1,017 | 11 | 7 | 2023-06-12 |
| 60 | Snelten, Jeffrey | 1,979 | 9 | 4 | 2024-03-13 |
| 61 | Dryden, Michael | 349 | 8 | 11 | 2024-03-13 |
| 62 | Gaza, John Edward | 102 | 8 | 14 | 2023-02-22 |
| 63 | Bassham, Billy | 557 | 7 | 14 | 2024-02-01 |
| 64 | Thierry, Keith | 212 | 7 | 8 | 2022-06-06 |
| 65 | Kickapoo Drilling Co. | 56 | 7 | 8 | 2023-06-27 |
| 66 | Stone, Bradley W. | 146 | 6 | 6 | 2023-12-21 |
| 67 | Erwin, James R. | 38 | 6 | 14 | 2024-02-23 |
| 68 | Hacker, Tim | 388 | 5 | 11 | 2023-10-19 |
| 69 | Schwall, John J. | 247 | 5 | 3 | 2023-05-22 |
| 70 | Boyce, Kenneth D. | 1,499 | 4 | 2 | 2023-05-20 |
| 71 | White, Chris Alan | 443 | 4 | 11 | 2023-06-27 |
| 72 | Blake, Wayne D. | 219 | 4 | 2 | 2023-05-16 |
| 73 | Roberts Environmental | 34 | 4 | 4 | 2023-12-14 |
| 74 | Weirich, William Theodore | 577 | 3 | 11 | 2023-05-18 |
| 75 | Dober, Darrel | 481 | 3 | 7 | 2023-12-09 |
| 76 | Cole, Steve | 362 | 3 | 10 | 2022-04-27 |
| 77 | Warner, Scott | 101 | 3 | 5 | 2023-04-19 |
| 78 | Niffenegger Well & Pump | 87 | 3 | 2 | 2022-08-18 |
| 79 | Tri County Irrigation & | 40 | 3 | 11 | 2022-12-12 |
| 80 | Rosenquist, Robert G. | 162 | 2 | 8 | 2022-09-23 |
| 81 | Baker, J. Curtis | 59 | 2 | 12 | 2023-10-20 |
| 82 | Layne Christensen Co. | 58 | 2 | 20 | 2023-11-14 |
| 83 | Albrecht Well Drilling Inc. | 58 | 2 | 15 | 2023-04-21 |
| 84 | Watters, James | 46 | 2 | 3 | 2022-06-22 |
| 85 | Hemmen, Jake | 27 | 2 | 12 | 2023-03-21 |
| 86 | Huemann, William F. | 4,147 | 1 | 5 | 2023-06-20 |
| 87 | K & K Well Drilling | 3,047 | 1 | 24 | 2023-11-16 |
| 88 | Hinkle, J & J Well & Septic | 1,011 | 1 | 6 | 2022-08-28 |
| 89 | Liberg, Patrick A. | 780 | 1 | 9 | 2025-03-05 |
| 90 | Scates, Thomas L. | 245 | 1 | 7 | 2022-08-18 |
| 91 | Deppe, Edward M. | 188 | 1 | 7 | 2022-07-08 |
| 92 | Gingerich, Klint | 94 | 1 | 8 | 2022-08-09 |
| 93 | Winslow, Loring Field | 53 | 1 | 4 | 2025-02-20 |
| 94 | Faherty, Jeff | 27 | 1 | 2 | 2022-06-21 |
| 95 | Kohnen, Clarence | 13,419 | — | 45 | 2017-10-31 |
| 96 | Fykes, Charles N. | 6,006 | — | 15 | 2009-12-12 |
| 97 | Knierim, Phil | 5,399 | — | 27 | 2001-05-10 |
| 98 | Gaffke, George E. | 4,869 | — | 8 | 2010-03-24 |
| 99 | Sauder, Steven E. | 2,983 | — | 17 | 2020-10-20 |
| 100 | Noll, Gary E. | 2,783 | — | 12 | 2001-03-24 |
| 101 | Layten, James | 2,660 | — | 15 | 2019-12-05 |
| 102 | Reynolds, Joseph R. | 2,516 | — | 34 | 1993-12-09 |
| 103 | Martin, Jonas Willard | 2,422 | — | 15 | 2000-11-24 |
| 104 | Wellendorf, Rodney | 2,319 | — | 15 | 2010-06-10 |
| 105 | Kingsley, Arthur W. | 2,304 | — | 10 | 2008-12-29 |
| 106 | Beaman, Jessie J. | 2,289 | — | 7 | 2017-10-15 |
| 107 | Sharpe, Franklin N. | 2,247 | — | 10 | 2019-01-17 |
| 108 | Snelten, Richard Charles | 2,194 | — | 4 | 2007-06-26 |
| 109 | Brown, Darwin | 2,166 | — | 11 | 2015-11-04 |
| 110 | Livingston, Lowell | 2,135 | — | 8 | 2021-08-23 |
| 111 | Rob, Ronald Gene | 2,082 | — | 18 | 2018-10-15 |
| 112 | Madsen, Charles E. | 2,055 | — | 2 | 2001-10-04 |
| 113 | Baker, Earl Jr. | 1,933 | — | 43 | 1994-09-16 |
| 114 | Albrecht, S. Dean | 1,880 | — | 46 | 2008-01-16 |
| 115 | Reynolds Well Drilling | 1,867 | — | 38 | 2020-10-13 |
| 116 | Fordonski, Keith | 1,694 | — | 19 | 2015-05-14 |
| 117 | Efflandt, Robert | 1,683 | — | 7 | 2010-04-27 |
| 118 | Layne-Western Co. | 1,635 | — | 78 | 2015-09-24 |
| 119 | Nice, Mark E. | 1,607 | — | 13 | 2021-09-16 |
| 120 | Matherly, Hubert | 1,534 | — | 11 | 2006-12-07 |
| 121 | Walters, Larry | 1,525 | — | 12 | 2013-07-10 |
| 122 | Walters, Steven | 1,494 | — | 24 | 2004-07-21 |
| 123 | Wiesenhofer, Andrew | 1,489 | — | 49 | 2020-06-18 |
| 124 | Griffy, Cecil | 1,469 | — | 4 | 2016-12-28 |
| 125 | Courson, Roger | 1,463 | — | 17 | 2002-11-19 |
| 126 | Latta, Kirk Stephen | 1,463 | — | 14 | 2016-03-17 |
| 127 | Link, Harold F. | 1,395 | — | 25 | 1993-08-16 |
| 128 | Hoover, Lonny R. | 1,362 | — | 5 | 2001-04-02 |
| 129 | Lyons, Glenn L | 1,360 | — | 10 | 1997-01-03 |
| 130 | Snelten, Greg | 1,307 | — | 6 | 2021-06-14 |
| 131 | Matthesius, Fred H. | 1,282 | — | 6 | 1989-11-30 |
| 132 | Haudrich, Clyde Jerome | 1,278 | — | 7 | 2016-11-15 |
| 133 | Senffner, Alan James | 1,253 | — | 12 | 2020-11-05 |
| 134 | Cole, Raymond J. | 1,228 | — | 29 | 1999-11-22 |
| 135 | Dietzman, Gerald E. | 1,227 | — | 20 | 2008-06-19 |
| 136 | Speth, James | 1,212 | — | 18 | 2020-06-03 |
| 137 | Lyons, Larry | 1,197 | — | 9 | 2020-04-15 |
| 138 | Dirks, Michael | 1,165 | — | 33 | 2019-04-25 |
| 139 | Madsen, Michael A. | 1,155 | — | 2 | 2021-07-30 |
| 140 | Rob, Peter | 1,154 | — | 7 | 1985-08-16 |
| 141 | Beasley, Eugene B. | 1,135 | — | 15 | 1986-09-02 |
| 142 | Nice, Marvin R. | 1,124 | — | 10 | 1997-11-12 |
| 143 | Gross, Michael | 1,119 | — | 3 | 2009-04-10 |
| 144 | Dupage Pump | 1,095 | — | 8 | 1981-01-04 |
| 145 | Mashburn, Robert | 1,076 | — | 11 | 2016-11-10 |
| 146 | Timmerman, Tom | 1,020 | — | 6 | 2018-07-18 |
| 147 | Greenfield, Edwin D. | 1,015 | — | 8 | 2021-10-25 |
| 148 | Olson, Robert C | 1,010 | — | 11 | 1992-09-02 |
| 149 | Jet Hall/Lutes H2o Well Drlg. | 1,008 | — | 14 | 2021-12-24 |
| 150 | Hopson, Seldon C | 1,004 | — | 16 | 1994-07-25 |
| 151 | Bekemeyer, Gust | 991 | — | 9 | 1992-07-04 |
| 152 | Bergschneider, Richard | 988 | — | 14 | 2000-08-17 |
| 153 | Boetsch, William M. | 967 | — | 7 | 2003-03-10 |
| 154 | Bull, Jack D. | 949 | — | 8 | 1999-04-12 |
| 155 | Dresden, Edward L. | 930 | — | 6 | 2000-12-01 |
| 156 | Beckett, Donald | 911 | — | 31 | 2018-10-30 |
| 157 | Knierim, James | 900 | — | 29 | 1994-09-12 |
| 158 | Rosenquist, Gerald Wilbur | 891 | — | 9 | 2000-01-18 |
| 159 | Knierim Company, Inc. | 888 | — | 11 | 1978-11-01 |
| 160 | Henry, John | 876 | — | 31 | 2020-05-04 |
| 161 | Hoover Water Well Service | 872 | — | 4 | 2006-08-29 |
| 162 | Sims, R. Marc Jr. | 867 | — | 13 | 2013-11-22 |
| 163 | Knierim, Paul L. | 850 | — | 7 | 1982-07-28 |
| 164 | Schuur, Bill | 836 | — | 10 | 2018-07-26 |
| 165 | Wilson, Olen L. | 801 | — | 9 | 1984-06-27 |
| 166 | Kremer, Jack Lee | 797 | — | 13 | 2012-01-16 |
| 167 | Wehling Well Works, Inc. | 797 | — | 26 | 1991-09-26 |
| 168 | Meadow Equipment | 787 | — | 15 | 2013-07-11 |
| 169 | Adolphson, Robert M. Jr. | 759 | — | 12 | 1990-09-25 |
| 170 | Howe, Robert E. Jr. | 732 | — | 3 | 2007-11-27 |
| 171 | Findlay, Terry A. | 723 | — | 6 | 2015-05-05 |
| 172 | Prairie, Arthur | 720 | — | 3 | 2001-04-26 |
| 173 | Hepp, Frank D. Jr. | 719 | — | 14 | 2008-08-08 |
| 174 | Bloyer Well Co. | 709 | — | 6 | 2016-10-10 |
| 175 | Bull, Jack Well & Septic | 707 | — | 5 | 2002-05-04 |
| 176 | Albrecht, Dean S. | 703 | — | 35 | 1993-08-13 |
| 177 | Thompson, John J. | 703 | — | 5 | 2020-03-23 |
| 178 | Snelten, Stephen A. | 700 | — | 6 | 2010-10-08 |
| 179 | Hofstetter, William S. | 697 | — | 10 | 1994-07-16 |
| 180 | Madsen, Charles | 676 | — | 1 | 1969-06-01 |
| 181 | Goodrum, Larry P. | 674 | — | 5 | 2017-10-11 |
| 182 | Pilgard, Peter | 673 | — | 7 | 1990-12-19 |
| 183 | Foyle, Richard S. | 659 | — | 3 | 1980-02-15 |
| 184 | Ebert, Robert H | 654 | — | 7 | 2014-10-29 |
| 185 | Lutes, George W. | 652 | — | 10 | 1998-06-23 |
| 186 | Bush, Henry L. | 649 | — | 13 | 1997-08-29 |
| 187 | Wilson, Deneal | 646 | — | 12 | 2016-11-20 |
| 188 | Hacker, Delbert | 646 | — | 15 | 1998-08-10 |
| 189 | Scherf Robert William | 628 | — | 16 | 1991-10-08 |
| 190 | Forder, James | 610 | — | 8 | 2017-05-17 |
| 191 | Pilgard, John P. | 607 | — | 7 | 1995-10-23 |
| 192 | Beanland, John R. | 605 | — | 14 | 2018-10-06 |
| 193 | Sims, Ronald M. Sr. | 602 | — | 22 | 2000-07-20 |
| 194 | Wehling, Wendell E. | 590 | — | 12 | 2006-01-03 |
| 195 | Wertz, Charles L. | 584 | — | 3 | 1995-05-31 |
| 196 | Strange, Robert E. | 568 | — | 10 | 2021-10-25 |
| 197 | NO Company | 564 | — | 62 | 1993-01-01 |
| 198 | Horman, Paul | 563 | — | 11 | 2020-08-24 |
| 199 | Erwin, Harold E. | 559 | — | 13 | 2002-08-30 |
| 200 | Luttrell, Gerald Dean | 553 | — | 17 | 1995-04-06 |
| 201 | Grosch, Wayne A. | 545 | — | 38 | 2006-02-28 |
| 202 | Kerry, Charles M. | 538 | — | 14 | 2009-09-30 |
| 203 | Gwin Drilling Co. | 537 | — | 18 | 1976-06-01 |
| 204 | Neely, Harry C. | 534 | — | 14 | 1999-12-20 |
| 205 | Fischer, James Monroe | 532 | — | 8 | 2021-12-25 |
| 206 | Beaman, John A. | 522 | — | 8 | 2016-05-11 |
| 207 | Coad, Floyd M. | 515 | — | 5 | 1999-11-16 |
| 208 | Johnson, James P. | 507 | — | 9 | 1980-12-30 |
| 209 | Dowell, S.l. | 504 | — | 19 | 2012-05-15 |
| 210 | Vaughn, Kenneth G. | 503 | — | 9 | 2009-04-01 |
| 211 | Kuntz, John E. | 503 | — | 7 | 2007-04-24 |
| 212 | Sisson, Edward | 502 | — | 8 | 1991-04-12 |
| 213 | Geer, James A. | 498 | — | 14 | 1992-10-31 |
| 214 | Mckinney, Melvin | 494 | — | 6 | 1986-11-26 |
| 215 | St. Charles Drilling Co. | 480 | — | 14 | 1981-11-20 |
| 216 | Mills, Wayne | 469 | — | 3 | 2014-05-23 |
| 217 | Erwin, James Ray | 466 | — | 12 | 2008-08-28 |
| 218 | Bisping, Calvin | 465 | — | 10 | 2010-10-06 |
| 219 | Sloan, Thomas F. | 463 | — | 28 | 2021-09-20 |
| 220 | Luttrell, James | 459 | — | 14 | 2001-11-21 |
| 221 | Blake, William D. | 457 | — | 2 | 2003-10-06 |
| 222 | Neeley, Harry C. | 456 | — | 9 | 1993-07-30 |
| 223 | Nice, Craig | 450 | — | 7 | 2001-07-20 |
| 224 | Harold Dean Albrecht | 443 | — | 20 | 2007-03-20 |
| 225 | Ebert, William M. | 438 | — | 6 | 1998-05-20 |
| 226 | Biggerstaff, James | 432 | — | 8 | 1984-03-04 |
| 227 | Keen, Bradley E. | 426 | — | 19 | 2016-09-12 |
| 228 | Albrecht, S. D. | 425 | — | 17 | 1989-02-19 |
| 229 | Woodward, Lawrence | 421 | — | 12 | 1996-03-11 |
| 230 | Jurs, Martin & Son | 420 | — | 4 | 1978-10-15 |
| 231 | Acker, Roger | 413 | — | 10 | 2003-10-01 |
| 232 | Haudrich Drlg. | 410 | — | 5 | 1977-10-17 |
| 233 | Shoemaker & Sons Drilling | 407 | — | 13 | 2009-09-01 |
| 234 | Silvius Bros. | 398 | — | 6 | 1979-08-01 |
| 235 | Hopson, Scott | 395 | — | 12 | 2004-03-02 |
| 236 | Jones, Gerald K. | 393 | — | 10 | 2020-09-17 |
| 237 | Prairie, Art | 393 | — | 2 | 1980-09-01 |
| 238 | Roberts, Charles Wayne | 384 | — | 10 | 2018-10-18 |
| 239 | Liberg, Steven Scott | 378 | — | 10 | 2012-05-04 |
| 240 | Pohlman, Herman J. | 369 | — | 12 | 1993-12-02 |
| 241 | Randy Roop/Jonas Martin Drlg. | 367 | — | 10 | 2007-01-30 |
| 242 | Carlson, William L. | 366 | — | 2 | 1989-04-10 |
| 243 | Liberg, Thomas P. | 357 | — | 7 | 1993-08-18 |
| 244 | Swanson, Jean E. | 355 | — | 10 | 1997-12-01 |
| 245 | Lockport Well & Pump | 354 | — | 7 | 2009-11-01 |
| 246 | Gross, Eugene J. | 352 | — | 1 | 1999-09-25 |
| 247 | Boysen, Henry Co. | 350 | — | 7 | 2005-10-03 |
| 248 | Wills, William D. | 348 | — | 7 | 2017-09-19 |
| 249 | Stone, Ronald | 347 | — | 5 | 1994-01-06 |
| 250 | Liberg, John E. | 346 | — | 13 | 2019-10-08 |
| 251 | Abbott, Albert | 344 | — | 11 | 1987-06-16 |
| 252 | Stone, Guy D. | 340 | — | 8 | 2007-08-28 |
| 253 | Mashburn, Grover C. Jr. | 338 | — | 11 | 1994-09-18 |
| 254 | Richey, Quentin R. | 330 | — | 14 | 1981-07-17 |
| 255 | Cook, George | 330 | — | 11 | 1981-09-01 |
| 256 | Williams, Robert | 327 | — | 10 | 2018-01-26 |
| 257 | Wauchholder Well Drilling | 324 | — | 2 | 2012-05-15 |
| 258 | York, Warren Thomas | 323 | — | 4 | 2007-09-15 |
| 259 | Holleman, Herbert | 321 | — | 3 | 1982-11-28 |
| 260 | Hutchings, Clyde A. | 321 | — | 6 | 1994-08-26 |
| 261 | Scherf, Robert W. | 320 | — | 15 | 1991-05-02 |
| 262 | Wehling, Richard H. | 319 | — | 23 | 1994-08-05 |
| 263 | Pitz, John W. | 318 | — | 9 | 2003-10-02 |
| 264 | Fleming, Rodney K. | 317 | — | 11 | 1991-12-31 |
| 265 | Miller, J.p. Artesian Well Co. | 317 | — | 32 | 1983-09-16 |
| 266 | Jones, Gerald B. | 315 | — | 12 | 1991-07-23 |
| 267 | Stinnett, James R. | 314 | — | 8 | 1992-10-02 |
| 268 | Mckinney, Ted | 313 | — | 33 | 1985-06-21 |
| 269 | Martin, Lawrence | 311 | — | 3 | 1998-07-10 |
| 270 | Gross, Emil E. | 309 | — | 2 | 1988-04-20 |
| 271 | John A. Jablonski | 306 | — | 6 | 2007-01-21 |
| 272 | Arron Baum | 302 | — | 21 | 2007-06-11 |
| 273 | Huemann, John J. | 302 | — | 4 | 2005-08-11 |
| 274 | Knierim, Phillip E. | 301 | — | 5 | 1978-07-10 |
| 275 | Stone, Ronald D. | 301 | — | 7 | 1992-10-13 |
| 276 | Wiesenhofer, Donald E. | 300 | — | 11 | 2012-09-12 |
| 277 | Heins, Don | 300 | — | 5 | 1974-03-15 |
| 278 | Miller, J. P. Art. Well | 299 | — | 28 | 1978-10-12 |
| 279 | Tri County Well & Pump | 298 | — | 11 | 2017-07-12 |
| 280 | Knierum, Paul | 298 | — | 9 | 1974-04-30 |
| 281 | Weburg, E. Marvin | 292 | — | 5 | 1980-08-01 |
| 282 | Sission, Edward H. | 292 | — | 5 | 1983-08-25 |
| 283 | Stone, James R. | 292 | — | 8 | 1992-10-21 |
| 284 | Donald E. Stoneberger | 281 | — | 7 | 2001-08-28 |
| 285 | Eaton, Zane C. | 279 | — | 11 | 1989-06-27 |
| 286 | Wirfs, Clements J. | 277 | — | 2 | 1981-03-25 |
| 287 | D & S Drilling | 275 | — | 8 | 1976-10-09 |
| 288 | Lecocq, E. J. | 275 | — | 2 | 1976-01-01 |
| 289 | Roy Thorne | 274 | — | 16 | 2005-10-26 |
| 290 | Jack Bull Well & Septic | 274 | — | 6 | 2002-06-21 |
| 291 | Henry Boysen Co.,Lichter,John | 272 | — | 4 | 1973-08-30 |
| 292 | Wehling, E. C. | 271 | — | 4 | 1973-09-18 |
| 293 | Baum, Arron | 270 | — | 19 | 2008-09-26 |
| 294 | Miller, Alfred Hampton | 267 | — | 10 | 1996-05-21 |
| 295 | Sergent, William E. | 261 | — | 15 | 1985-07-30 |
| 296 | Geltz, N. H. | 258 | — | 6 | 2018-04-05 |
| 297 | Baker, E. C. & Sons | 255 | — | 34 | 2002-12-09 |
| 298 | H2o Well & Pump Co. | 252 | — | 4 | 2008-11-15 |
| 299 | Breitzke, Wm. | 249 | — | 4 | 1958-01-01 |
| 300 | Wayne D. Blake | 249 | — | 1 | 2006-09-28 |
| 301 | Jablonski, John A. | 248 | — | 7 | 2020-12-24 |
| 302 | Hofstetter, Ralph W. | 248 | — | 4 | 2015-10-13 |
| 303 | Doyle, Gerald | 246 | — | 9 | 2015-02-02 |
| 304 | Seibring Well Drilling | 244 | — | 4 | 2013-07-26 |
| 305 | Rix, John Richard | 242 | — | 6 | 2013-10-01 |
| 306 | Dreher & Schorie | 242 | — | 2 | 1979-06-01 |
| 307 | Speth, David A. | 241 | — | 6 | 1996-06-25 |
| 308 | Olson, Alan R. | 241 | — | 5 | 1999-06-08 |
| 309 | Hinkle, James A. | 239 | — | 5 | 1998-09-24 |
| 310 | Joe Arwood | 236 | — | 4 | 2006-03-28 |
| 311 | Mckinney, Melvin D. | 231 | — | 4 | 1994-06-12 |
| 312 | Miles & Sons | 230 | — | 11 | 1974-02-01 |
| 313 | Speth, David | 228 | — | 9 | 2013-08-14 |
| 314 | Callihan, Michael M. | 228 | — | 5 | 1992-07-08 |
| 315 | Harper, Jerry | 228 | — | 2 | 2006-01-11 |
| 316 | Hacker, Marvin | 227 | — | 10 | 2012-06-05 |
| 317 | Groves, Forest E. | 225 | — | 7 | 1994-11-06 |
| 318 | Dana, Glen | 225 | — | 11 | 2021-07-30 |
| 319 | Dohrman, Raymond | 224 | — | 6 | 1995-07-12 |
| 320 | Charles Hollinshead | 224 | — | 17 | 2007-04-06 |
| 321 | Jacobs, Ray E. | 222 | — | 15 | 1991-08-03 |
| 322 | Luton, C.m. | 220 | — | 8 | 1979-11-24 |
| 323 | Jensen, Kenneth Lee | 216 | — | 6 | 1995-03-29 |
| 324 | Rider, John Bennedict | 214 | — | 6 | 1987-11-12 |
| 325 | Olson Well & Pump Co. | 214 | — | 7 | 2005-08-31 |
| 326 | Glenn, James E. | 214 | — | 3 | 2009-06-11 |
| 327 | Stanley, Charles | 213 | — | 6 | 1998-07-01 |
| 328 | Hampton, Edward T. | 211 | — | 11 | 1977-10-14 |
| 329 | Anderson & Son, T. F. | 211 | — | 4 | 1966-06-01 |
| 330 | Kinman, Otho | 210 | — | 4 | 1965-01-01 |
| 331 | Senffner, Keith | 210 | — | 11 | 2007-12-20 |
| 332 | Harding, James R. | 209 | — | 8 | 1997-08-24 |
| 333 | Miller, Claude W. | 208 | — | 8 | 1990-01-15 |
| 334 | Hinkle, T. | 208 | — | 3 | 1976-11-30 |
| 335 | Sheets, Michael | 208 | — | 2 | 2002-10-21 |
| 336 | Ward, Delbert G. | 206 | — | 5 | 2017-03-10 |
| 337 | David Harper | 205 | — | 5 | 2006-11-22 |
| 338 | Liberg, Paul Evan | 205 | — | 5 | 1994-10-06 |
| 339 | Martin, C. & Sons Well Co. | 202 | — | 6 | 2009-05-17 |
| 340 | Rimbey, Brian | 201 | — | 16 | 2009-05-16 |
| 341 | Elfmann, Larry T. | 198 | — | 5 | 1994-07-14 |
| 342 | Glenn, E. H. | 198 | — | 3 | 2000-06-27 |
| 343 | H&h Drilling | 197 | — | 2 | 1991-12-10 |
| 344 | Niffenegger, ED | 197 | — | 3 | 1984-06-21 |
| 345 | Guarin, Harland | 196 | — | 10 | 1999-02-12 |
| 346 | Cosby, Edward L. Sr. | 196 | — | 6 | 1997-09-09 |
| 347 | Acker, Norman L. | 195 | — | 4 | 1989-06-27 |
| 348 | Hampton, E. T. | 193 | — | 10 | 1976-06-01 |
| 349 | Pilgard, Peter & Sons | 190 | — | 4 | 1993-04-26 |
| 350 | Berns, George J. | 189 | — | 2 | 1950-09-01 |
| 351 | Faherty, Francis | 189 | — | 2 | 2006-09-15 |
| 352 | Pitz, N. L. | 187 | — | 6 | 1977-07-01 |
| 353 | Puckett, Arnold L. | 186 | — | 8 | 1996-09-30 |
| 354 | Hollinshead, Charles | 185 | — | 14 | 2012-07-28 |
| 355 | Grosch Irrigation | 185 | — | 23 | 2020-10-07 |
| 356 | Efflandt, Herman John | 185 | — | 4 | 1995-08-28 |
| 357 | Eaton Well Drlg.(Zane Eaton) | 182 | — | 11 | 1985-03-01 |
| 358 | Barker, Paul A. | 182 | — | 9 | 1979-04-09 |
| 359 | Holleman, Herbert Jr. | 182 | — | 3 | 1983-12-08 |
| 360 | Rieke Well Drilling Co. | 181 | — | 5 | 1970-07-19 |
| 361 | Lode, Lawrence James | 180 | — | 5 | 2009-12-18 |
| 362 | Ruester, John T. | 179 | — | 29 | 1985-07-03 |
| 363 | Hageman, Alvin B. | 179 | — | 10 | 2008-10-16 |
| 364 | Keen, George | 177 | — | 12 | 1995-08-14 |
| 365 | White, Harold E. | 177 | — | 7 | 2000-11-21 |
| 366 | Aneffco Well Drilling | 177 | — | 11 | 2002-06-14 |
| 367 | Kuntz, Peter William | 176 | — | 7 | 1990-05-17 |
| 368 | Mckinsey, Melvin D. | 176 | — | 2 | 1977-02-01 |
| 369 | Wills, Elmer | 174 | — | 5 | 1998-03-24 |
| 370 | Dober, Darrel R. | 174 | — | 9 | 1995-08-01 |
| 371 | Dement, Ray | 173 | — | 8 | 1988-10-24 |
| 372 | Kohnen, Clarence E. | 172 | — | 15 | 1992-11-12 |
| 373 | Shoemaker, John E. | 170 | — | 11 | 1993-12-24 |
| 374 | Tyrrell, Jeffrey | 170 | — | 8 | 2020-11-09 |
| 375 | Bottlemy, August | 170 | — | 2 | 1973-07-18 |
| 376 | Niffenegger, Edward L. | 168 | — | 3 | 2011-07-01 |
| 377 | Stevens, Dale O. | 167 | — | 6 | 2006-05-30 |
| 378 | Binz, Wayne L. | 167 | — | 3 | 1980-08-10 |
| 379 | Woollen Brothers | 165 | — | 8 | 1970-05-26 |
| 380 | Kuntz, John | 165 | — | 6 | 1997-02-12 |
| 381 | Wakefield, Jerry H | 164 | — | 10 | 1996-07-24 |
| 382 | Winslow, Edwin F. | 163 | — | 10 | 1997-10-06 |
| 383 | E & D Well Drilling | 163 | — | 4 | 1972-11-28 |
| 384 | Abbott, Albert G. | 162 | — | 4 | 1979-08-17 |
| 385 | Bjorklund, Lloyd A. | 162 | — | 9 | 1997-07-01 |
| 386 | Klint Gingerich | 161 | — | 10 | 2007-01-18 |
| 387 | Tyrrell R W | 161 | — | 2 | 1979-05-10 |
| 388 | DU Page Pump Inc. | 161 | — | 4 | 1978-09-27 |
| 389 | Allabaugh, Neil M. | 160 | — | 6 | 2006-05-02 |
| 390 | Raney, Sherman | 158 | — | 6 | 1981-01-24 |
| 391 | Butts, Leon | 157 | — | 6 | 1976-07-20 |
| 392 | Crumpler, William | 156 | — | 5 | 1977-09-20 |
| 393 | Dingledine, David | 155 | — | 3 | 2012-09-26 |
| 394 | Johnson C R | 155 | — | 3 | 1978-09-01 |
| 395 | French, Loren K. | 154 | — | 7 | 1979-11-01 |
| 396 | Foyle, Bert | 153 | — | 1 | 1945-01-01 |
| 397 | O. Lutes & Son | 152 | — | 2 | 1976-02-09 |
| 398 | Warth, William | 151 | — | 9 | 2004-04-13 |
| 399 | Dana, Steve | 151 | — | 8 | 2006-12-01 |
| 400 | Rosset, Richard D. | 151 | — | 3 | 2006-02-01 |
| 401 | Skouby, Charles A. | 150 | — | 3 | 2016-10-28 |
| 402 | Durbin, Kandra M. | 149 | — | 22 | 2019-07-18 |
| 403 | Fleming, Daniel D. | 149 | — | 9 | 1979-12-31 |
| 404 | Hunter, Dennis | 149 | — | 7 | 2001-04-28 |
| 405 | Diebold Chester C | 149 | — | 3 | 1968-05-01 |
| 406 | Tascher, Vincent A. | 148 | — | 2 | 1998-06-12 |
| 407 | Buffington, G. | 147 | — | 32 | 2014-09-03 |
| 408 | Gibbs Well Drilling | 147 | — | 15 | 1977-05-09 |
| 409 | Miller, J.p. Co. | 146 | — | 19 | 1982-06-21 |
| 410 | L. J. Macauley & Sons | 146 | — | 1 | 1943-01-01 |
| 411 | Mills,Wayn/Prairie Well Drlg. | 145 | — | 2 | 2001-02-15 |
| 412 | Courson, Richard C. | 144 | — | 9 | 1979-05-28 |
| 413 | David M. Smith | 144 | — | 5 | 2006-11-30 |
| 414 | Kuehn, Kurt | 144 | — | 5 | 1997-05-10 |
| 415 | Acker, Norman | 143 | — | 2 | 1979-08-22 |
| 416 | Bolliger, John & Sons | 142 | — | 12 | 1966-10-01 |
| 417 | Lamp, Robert Wayne | 141 | — | 6 | 1997-07-15 |
| 418 | Glen Dana | 141 | — | 8 | 2006-07-13 |
| 419 | Woodruff Charles Co. | 141 | — | 4 | 1973-11-01 |
| 420 | Woodruff, Charles E. Co. | 140 | — | 5 | 1975-01-31 |
| 421 | Thompson, Nicholas R. | 139 | — | 5 | 2012-10-07 |
| 422 | Mckinney, Winifred | 139 | — | 3 | 1980-06-16 |
| 423 | Greenfield, ED | 138 | — | 10 | 1993-05-21 |
| 424 | Sims Drilling Co. | 137 | — | 11 | 2009-12-17 |
| 425 | Palmer & Son, B. L. | 137 | — | 3 | 1978-12-01 |
| 426 | Baker, Paul A. | 137 | — | 4 | 1979-07-01 |
| 427 | Van Gilder, Richard E. | 136 | — | 6 | 2012-07-23 |
| 428 | Huikle, T. | 136 | — | 3 | 1974-11-13 |
| 429 | Baker, Donald | 135 | — | 15 | 1995-11-01 |
| 430 | Hatton Bros. | 134 | — | 1 | 1974-01-15 |
| 431 | Adolphson Well Drlg. Service | 134 | — | 2 | 1974-07-29 |
| 432 | Martin, Charles Leroy | 134 | — | 4 | 1999-06-21 |
| 433 | Wehling, Richard W. | 132 | — | 10 | 2019-09-05 |
| 434 | Holleman, H. | 131 | — | 3 | 1980-05-20 |
| 435 | Latta, Mark Duane | 130 | — | 9 | 2019-07-29 |
| 436 | Delaney, Leonard I. | 130 | — | 2 | 1983-10-22 |
| 437 | Hart - Will-Dupage Drilling | 128 | — | 6 | 1978-03-01 |
| 438 | Fykes Charles & Pump | 127 | — | 2 | 1980-11-01 |
| 439 | Kerry, Charles | 127 | — | 5 | 1997-02-28 |
| 440 | Tolley, David F. | 126 | — | 13 | 2007-04-27 |
| 441 | Rimbey, Jesse Dick | 125 | — | 8 | 1998-11-15 |
| 442 | Wertz, Art | 125 | — | 2 | 1974-01-08 |
| 443 | Sergent, William Eli | 124 | — | 7 | 1974-07-01 |
| 444 | Hayes & Sims | 124 | — | 21 | 1951-08-27 |
| 445 | Brenner, James H. | 124 | — | 2 | 1989-04-26 |
| 446 | Brown Irrigation Co. | 124 | — | 6 | 1969-01-01 |
| 447 | Tyrrell, Richard William | 124 | — | 3 | 1991-06-09 |
| 448 | Alco Oil & Gas Corp. | 123 | — | 29 | 1998-10-23 |
| 449 | Fleming, D. D. | 122 | — | 7 | 1978-05-20 |
| 450 | Luhr Brothers, Inc. | 121 | — | 13 | 1976-10-01 |
| 451 | Lowry, John H. | 121 | — | 6 | 1975-03-20 |
| 452 | Stone H I & Son | 120 | — | 4 | 1976-12-10 |
| 453 | Wilson, Carl | 119 | — | 6 | 1976-09-18 |
| 454 | Potrykos, Frank | 118 | — | 1 | 1972-05-26 |
| 455 | Dick's Well & Pump | 117 | — | 3 | 2017-09-06 |
| 456 | Burge Drilling Co. & Dewatering | 116 | — | 1 | 2012-07-12 |
| 457 | Ryan, John H. | 116 | — | 13 | 1998-01-17 |
| 458 | White Bros. | 115 | — | 5 | 2000-05-02 |
| 459 | Zbinden, Daniel B. | 115 | — | 2 | 2017-09-27 |
| 460 | Knierim, Max | 115 | — | 7 | 1979-02-16 |
| 461 | Van Hoozen, Lucy H. | 115 | — | 4 | 1948-01-01 |
| 462 | Layne & Western Co. | 114 | — | 36 | 2013-05-16 |
| 463 | Sisk, Gary Drill Co. | 114 | — | 6 | 2013-07-01 |
| 464 | Geiger, S. B. | 114 | — | 8 | 1980-06-03 |
| 465 | Chitwood, Charles P. | 113 | — | 8 | 1990-04-25 |
| 466 | Vangilder, Richard E. | 112 | — | 4 | 1995-03-15 |
| 467 | Ken Knierim/K & K Well Drlg. | 112 | — | 8 | 2006-04-18 |
| 468 | Pediger, Dan | 112 | — | 2 | 1974-10-01 |
| 469 | Wilson, Carline | 111 | — | 7 | 1988-08-26 |
| 470 | Joseph Allen | 110 | — | 9 | 2007-02-27 |
| 471 | Hawkins, Howard/Adolphson, Bob | 110 | — | 3 | 1978-08-06 |
| 472 | Moore, John V. | 108 | — | 10 | 2005-08-27 |
| 473 | Lentz Tony | 107 | — | 1 | 1949-05-01 |
| 474 | Smeja, Robert B. | 107 | — | 6 | 1996-02-15 |
| 475 | Dohrman, Donald W. | 105 | — | 5 | 1981-11-11 |
| 476 | Blake, Russell | 105 | — | 5 | 1978-11-11 |
| 477 | Dresden, Edward | 105 | — | 3 | 1982-08-03 |
| 478 | Boysen, Henry Co.,Lichter,John | 105 | — | 3 | 1974-09-22 |
| 479 | Zhieriy, Keith | 103 | — | 9 | 2019-03-27 |
| 480 | Pilgard, Peter & Son | 103 | — | 4 | 1979-01-31 |
| 481 | Roper, William H. | 103 | — | 3 | 1978-08-09 |
| 482 | Swanson, Randy | 102 | — | 9 | 1997-04-19 |
| 483 | Erwin, James | 101 | — | 12 | 2016-12-22 |
| 484 | Carson, James R. | 101 | — | 25 | 1986-06-19 |
| 485 | Edward M. Deppe | 101 | — | 5 | 2006-09-19 |
| 486 | Webber, Robert Lee | 101 | — | 2 | 1991-10-01 |
| 487 | Blake, Russell K. | 98 | — | 4 | 1994-10-30 |
| 488 | Martin, Lawrence W. | 98 | — | 2 | 1964-01-01 |
| 489 | Hoover Water Well Servic | 98 | — | 6 | 1975-08-01 |
| 490 | Klassen, Genevieve M. | 97 | — | 21 | 2012-04-28 |
| 491 | Snelton Bros. | 97 | — | 5 | 1940-10-01 |
| 492 | Glenn, Henry A. | 97 | — | 2 | 2003-03-18 |
| 493 | Haskins, D. | 96 | — | 7 | 2012-08-15 |
| 494 | Hall, Edward - Web Well & Pump | 96 | — | 5 | 2006-07-01 |
| 495 | Sims, Ronald M. Jr. | 95 | — | 10 | 1995-11-27 |
| 496 | Schmalz Geo A & Son | 95 | — | 2 | 1967-01-01 |
| 497 | Pittman, Robert Dale | 94 | — | 7 | 1973-07-06 |
| 498 | Gingerich, Emery Duane | 94 | — | 8 | 2017-12-20 |
| 499 | Comar Drilling Co., Inc. | 94 | — | 6 | 2014-08-07 |
| 500 | Hatfield, Larry | 93 | — | 13 | 2002-12-28 |
| 501 | Meyer, George | 93 | — | 6 | 1996-11-01 |
| 502 | Cole, Raymond Joseph Jr. | 93 | — | 11 | 2003-11-03 |
| 503 | Drake, Don | 92 | — | 2 | 1978-10-17 |
| 504 | Baker, Donald K. | 91 | — | 16 | 2012-11-23 |
| 505 | Reiners, Walter C. | 91 | — | 2 | 2003-08-21 |
| 506 | Bloyer, Ralph | 91 | — | 4 | 1972-06-08 |
| 507 | Bautsch, Thomas E. | 91 | — | 1 | 1997-02-25 |
| 508 | Grosch, Gottlieb W. | 90 | — | 6 | 1994-04-20 |
| 509 | Fischer James | 90 | — | 2 | 1978-08-01 |
| 510 | Wise, W. P. | 89 | — | 4 | 1978-09-01 |
| 511 | Chadwick, George | 89 | — | 8 | 1984-11-30 |
| 512 | Jurs Martin&sons Inc. | 89 | — | 4 | 1978-07-06 |
| 513 | Wertz, Arthur W. | 89 | — | 2 | 1982-03-15 |
| 514 | Dirks, Michael J. | 87 | — | 19 | 1995-10-06 |
| 515 | Dreher, Theodore Albert | 86 | — | 4 | 1987-06-22 |
| 516 | Yeoman, Omer | 86 | — | 5 | 1977-05-16 |
| 517 | Hopson, S. C. | 85 | — | 6 | 1991-06-21 |
| 518 | Harding, Thomas D. | 85 | — | 7 | 2006-10-24 |
| 519 | Quality Farm Equip | 84 | — | 1 | 1959-01-01 |
| 520 | Dana, Steven William | 84 | — | 6 | 2009-09-19 |
| 521 | Brady, C.e. | 83 | — | 7 | 1968-01-01 |
| 522 | Stone, Herald | 83 | — | 7 | 1976-02-06 |
| 523 | Miles, Edwin | 83 | — | 3 | 1977-05-20 |
| 524 | Richey, Quentin | 82 | — | 3 | 1976-08-01 |
| 525 | Arnt & Son - Dupage | 82 | — | 2 | 1959-01-01 |
| 526 | Snelten, A & C | 82 | — | 5 | 2018-10-29 |
| 527 | Snelten, Arthur Charles | 81 | — | 5 | 2004-04-15 |
| 528 | Eckel John | 81 | — | 3 | 1947-10-01 |
| 529 | Hoover, L. R. | 81 | — | 2 | 1978-09-29 |
| 530 | Lyons Glen | 80 | — | 3 | 1980-07-01 |
| 531 | Allabaugh, John H. | 79 | — | 9 | 2001-10-01 |
| 532 | Albrecht Well Drillers | 79 | — | 21 | 2002-07-11 |
| 533 | White Bros. Wells | 78 | — | 7 | 2006-09-27 |
| 534 | Crowe, Daniel J. | 78 | — | 17 | 2021-04-01 |
| 535 | Wehling, R. H. | 78 | — | 12 | 1993-12-07 |
| 536 | Wehling, Robert | 78 | — | 6 | 2003-09-25 |
| 537 | Allabaugh Well Co. | 78 | — | 10 | 2021-05-13 |
| 538 | Shaver, James R. Sr. | 78 | — | 6 | 1997-01-08 |
| 539 | Swanson, L. F. | 77 | — | 7 | 1973-08-04 |
| 540 | Stone, James | 77 | — | 4 | 1978-12-22 |
| 541 | Allen E. Smith | 75 | — | 4 | 2006-06-03 |
| 542 | Duke, Albert | 74 | — | 4 | 1967-01-01 |
| 543 | Wilson, Arnold | 74 | — | 4 | 1979-07-31 |
| 544 | Coppenbarger, Floyd Lyle | 74 | — | 7 | 1987-12-21 |
| 545 | Layne-Western Drlg | 73 | — | 28 | 2003-02-20 |
| 546 | Stinson, Larry | 73 | — | 6 | 2018-04-01 |
| 547 | Smith, David M. | 73 | — | 5 | 2021-07-13 |
| 548 | Motter, O. L. | 73 | — | 6 | 1974-11-30 |
| 549 | Hayes, Charles M. | 72 | — | 16 | 1996-06-25 |
| 550 | Ebert M & Co. | 72 | — | 6 | 1973-07-01 |
| 551 | Springer, Howard | 72 | — | 9 | 1979-05-27 |
| 552 | Jennings, Charles L. | 72 | — | 7 | 1974-10-24 |
| 553 | Suburban Well | 72 | — | 7 | 2007-08-10 |
| 554 | Macauley, W.r. | 72 | — | 1 | 1943-01-01 |
| 555 | William H. Crumpler | 71 | — | 1 | 1977-08-01 |
| 556 | Meyer, George J. | 71 | — | 4 | 2000-06-01 |
| 557 | Mallow | 71 | — | 4 | 1976-10-01 |
| 558 | Jennings, James E. | 70 | — | 5 | 1982-11-18 |
| 559 | Griffy, Cecil D. | 69 | — | 3 | 1976-12-01 |
| 560 | Burgess, Wayne T. | 69 | — | 4 | 1986-11-19 |
| 561 | Randy Gebke | 68 | — | 14 | 2005-08-16 |
| 562 | Rosenquist, Gerald | 68 | — | 4 | 1980-09-12 |
| 563 | Snelton, Peter | 68 | — | 4 | 2019-05-24 |
| 564 | Klassen, Genevieve Sue | 67 | — | 14 | 1994-11-18 |
| 565 | Vineyard, Gene F. | 67 | — | 2 | 1978-12-10 |
| 566 | Zanker, Joseph I. | 67 | — | 1 | 1973-10-01 |
| 567 | Burgess, Wayne Jr. | 67 | — | 3 | 1978-06-29 |
| 568 | Chadwick, George W. | 66 | — | 9 | 1983-12-15 |
| 569 | Sauder Well Drilling | 66 | — | 8 | 2016-11-01 |
| 570 | Larkin Drilling Company | 65 | — | 9 | 1968-12-13 |
| 571 | Mashburn Brothers | 65 | — | 6 | 1985-01-04 |
| 572 | Kelso, James | 65 | — | 5 | 2013-07-16 |
| 573 | Cosby, E. L. | 65 | — | 4 | 1972-12-28 |
| 574 | Will-Dupage Drilling | 64 | — | 7 | 1980-06-12 |
| 575 | Pohl, Harold N. | 64 | — | 6 | 1973-06-29 |
| 576 | Raimonde & Sons | 63 | — | 5 | 2019-12-02 |
| 577 | Bjorklund, Llyod A. | 63 | — | 4 | 1992-03-15 |
| 578 | Larson & Swanson | 63 | — | 4 | 1946-01-01 |
| 579 | Adolphson, Bob | 63 | — | 4 | 1980-06-05 |
| 580 | Knierin Paul | 63 | — | 12 | 1978-06-01 |
| 581 | Schmidt, Daniel L. | 63 | — | 2 | 1958-01-01 |
| 582 | Milaeger Well Drilling Co. | 63 | — | 12 | 1977-01-01 |
| 583 | Boetsch, W. R. | 63 | — | 2 | 1976-10-20 |
| 584 | Woodward, Larry A. | 62 | — | 12 | 1992-12-06 |
| 585 | Grieves, Clifford | 62 | — | 3 | 2017-02-01 |
| 586 | Sergent, William | 61 | — | 3 | 1978-04-12 |
| 587 | Fleming, Roy | 61 | — | 8 | 1986-08-26 |
| 588 | Rob, Ronald | 61 | — | 3 | 1987-03-12 |
| 589 | Galien, Vander Sam | 61 | — | 10 | 2014-06-12 |
| 590 | Neely, Paul C. | 61 | — | 2 | 1969-10-01 |
| 591 | Puckett, Arnold | 60 | — | 7 | 1980-11-26 |
| 592 | Hayes & Sims Drlg | 60 | — | 13 | 1952-03-01 |
| 593 | Swan, Karl F. | 60 | — | 7 | 2012-05-18 |
| 594 | Smith Well Drilling | 60 | — | 4 | 2015-11-29 |
| 595 | Balding, Shane | 60 | — | 6 | 2016-08-25 |
| 596 | Jones, Spencer R. | 60 | — | 2 | 2020-07-07 |
| 597 | Johnson, Charles R. | 60 | — | 3 | 1992-09-21 |
| 598 | Hepp, Frank | 59 | — | 3 | 1980-01-01 |
| 599 | Stoneberger, Donald E. | 59 | — | 6 | 1996-10-31 |
| 600 | Hofstetter Drilling | 59 | — | 4 | 1995-12-30 |
| 601 | Testing Service Corp. | 59 | — | 4 | 2014-06-23 |
| 602 | Norris, Marvin | 58 | — | 2 | 1975-04-03 |
| 603 | D & M Builders | 57 | — | 3 | 1998-11-01 |
| 604 | O'brien, Edward S. | 57 | — | 1 | 1975-05-01 |
| 605 | Luttrel, James | 56 | — | 11 | 1996-12-16 |
| 606 | Logan, James R. | 56 | — | 6 | 1983-11-15 |
| 607 | Corwin Gingerich | 56 | — | 5 | 2007-05-09 |
| 608 | M. & M. Development Company | 56 | — | 2 | 1959-07-01 |
| 609 | Burgess, Wayne T. Jr. | 56 | — | 3 | 1980-12-19 |
| 610 | Brackett, B. | 56 | — | 3 | 1969-12-10 |
| 611 | C. Martin & Sons Well Co. | 55 | — | 4 | 2006-06-22 |
| 612 | Von Oepen, Ernest | 55 | — | 3 | 1973-05-18 |
| 613 | Hinkle, Truman | 55 | — | 4 | 1976-08-15 |
| 614 | Grosch, Dick | 54 | — | 10 | 1994-04-02 |
| 615 | Smith, T. H. | 54 | — | 3 | 1949-01-01 |
| 616 | Yakimisky, John | 54 | — | 4 | 2011-10-06 |
| 617 | Tyrrell, Richard | 53 | — | 4 | 1979-09-08 |
| 618 | Central IL Electric | 53 | — | 2 | 1968-07-01 |
| 619 | Mattson, Arthur R. | 53 | — | 2 | 1996-04-01 |
| 620 | Layten | 52 | — | 1 | 1973-08-01 |
| 621 | Peerless Service Co. | 52 | — | 3 | 1962-07-01 |
| 622 | Touvell Albert R | 52 | — | 2 | 1971-04-01 |
| 623 | Bartmess, John B. | 51 | — | 5 | 1985-07-31 |
| 624 | Bollivar - Hinrichs Plumbing | 51 | — | 4 | 2007-03-26 |
| 625 | Huemann, Jos.h. & Sons, Inc. | 50 | — | 2 | 1998-10-02 |
| 626 | Laczynski, AL | 50 | — | 2 | 1970-11-24 |
| 627 | Rice Well Drilling | 50 | — | 1 | 1959-01-01 |
| 628 | Liberg Patrick S | 50 | — | 3 | 1979-03-01 |
| 629 | Pettis | 50 | — | 1 | 1930-01-01 |
| 630 | Thorne, W. L. Co. | 49 | — | 12 | 1947-07-08 |
| 631 | Sutton, Kellie R. | 49 | — | 5 | 1979-12-14 |
| 632 | Michael Dryden | 49 | — | 5 | 2007-07-03 |
| 633 | Santelman, Doyle D. | 49 | — | 4 | 1974-06-01 |
| 634 | Smith A J | 49 | — | 2 | 1941-03-01 |
| 635 | Turner, Martin | 48 | — | 3 | 1977-10-02 |
| 636 | Brenneisen ,Ross S. | 48 | — | 2 | 1978-07-30 |
| 637 | Lyons Geo | 48 | — | 2 | 1954-01-01 |
| 638 | Norman E D | 47 | — | 10 | 1971-05-01 |
| 639 | Gobel, Joseph Louis | 47 | — | 7 | 2015-02-06 |
| 640 | Denison Well Drilling | 47 | — | 1 | 1982-08-11 |
| 641 | Stoneberger, Donald | 47 | — | 5 | 1978-07-17 |
| 642 | Robert G. Rosenquist | 47 | — | 6 | 2006-07-17 |
| 643 | Crawford, H. | 46 | — | 6 | 1977-12-05 |
| 644 | IL State Geological Survey | 46 | — | 14 | 2018-08-09 |
| 645 | Mashburn, Bruce E. | 46 | — | 5 | 1988-08-18 |
| 646 | Brenneisen, S. Ross | 46 | — | 1 | 1977-04-01 |
| 647 | Steve Liberg, Jr. | 46 | — | 8 | 2006-12-23 |
| 648 | Wieting, John | 46 | — | 2 | 1947-01-01 |
| 649 | Szymanski, Mitchell J. | 46 | — | 3 | 1979-09-05 |
| 650 | Cook, George Jr. | 45 | — | 10 | 1979-09-01 |
| 651 | Szymanski, Ted J. | 45 | — | 2 | 1978-08-14 |
| 652 | Hedges, W.h. | 45 | — | 1 | 1929-01-01 |
| 653 | Varner C W | 44 | — | 13 | 1948-11-01 |
| 654 | Kelley, A.g. | 44 | — | 4 | 1966-04-18 |
| 655 | Layne North-Central | 44 | — | 6 | 1941-03-01 |
| 656 | Mitchell, Francis M. | 44 | — | 5 | 1976-07-02 |
| 657 | Brown, Leland E. | 44 | — | 1 | 1994-10-07 |
| 658 | Ebert Co. | 44 | — | 2 | 1979-06-02 |
| 659 | Strange, Michael K. | 44 | — | 2 | 1992-08-27 |
| 660 | Dougherty B J | 44 | — | 1 | 1942-09-01 |
| 661 | Woollen Earl D | 43 | — | 4 | 1974-01-01 |
| 662 | Knapp, C. O. | 43 | — | 1 | 1978-07-09 |
| 663 | Vickery Drilling Co., Inc. | 43 | — | 7 | 1966-08-01 |
| 664 | Winslow, ED F. | 43 | — | 4 | 1976-10-01 |
| 665 | Coad Stanley M | 43 | — | 5 | 1969-12-23 |
| 666 | Rosenquist, K. W. | 43 | — | 9 | 1973-05-30 |
| 667 | Millis, P. E. | 43 | — | 6 | 1946-01-01 |
| 668 | Snelten, Cornelius | 43 | — | 3 | 1942-01-01 |
| 669 | Blanchard Well Drilling | 43 | — | 1 | 1960-01-01 |
| 670 | Szymanski, Mitchell | 43 | — | 3 | 1983-01-18 |
| 671 | Midwest Radiant Fuel | 42 | — | 2 | 1948-05-01 |
| 672 | Potts, Paul W. | 42 | — | 3 | 1969-07-25 |
| 673 | Ready, Dale | 42 | — | 6 | 2000-06-29 |
| 674 | Chitty R E | 42 | — | 3 | 1958-01-01 |
| 675 | Schmalz, G.a. & Son | 42 | — | 3 | 1967-05-01 |
| 676 | Carper, Garland L. | 42 | — | 4 | 1979-08-30 |
| 677 | Meyer Drilling | 41 | — | 3 | 2010-12-16 |
| 678 | Kelly Drilling Co. | 41 | — | 5 | 1965-01-01 |
| 679 | Bolliger, William | 41 | — | 9 | 1982-06-23 |
| 680 | Dittmeyer, Peter W. | 41 | — | 2 | 1942-01-01 |
| 681 | Stone, Herald I. | 41 | — | 3 | 1994-02-15 |
| 682 | Charles M. Kerry | 41 | — | 3 | 1994-02-21 |
| 683 | Dowdy, Tony Jr. | 40 | — | 5 | 2019-11-18 |
| 684 | Dartwater Well Drlg | 40 | — | 3 | 1974-07-30 |
| 685 | Santelman, Walter | 40 | — | 2 | 1954-02-01 |
| 686 | Donald N. Cleary | 40 | — | 7 | 2001-09-19 |
| 687 | Tascher, Vincent | 40 | — | 1 | 2004-11-24 |
| 688 | Watson, Harold L. | 39 | — | 3 | 1958-01-01 |
| 689 | U S Army Corp OF Eng | 39 | — | 1 | 1942-09-01 |
| 690 | Wertz, C. L. | 39 | — | 2 | 1975-09-01 |
| 691 | Mcraven, Claude | 38 | — | 3 | 1973-02-25 |
| 692 | Mccord, Daniel | 38 | — | 4 | 1986-10-14 |
| 693 | Pittman, Dale | 38 | — | 4 | 1978-08-01 |
| 694 | Green, William Ernest | 38 | — | 9 | 1999-10-12 |
| 695 | Green, William E. | 38 | — | 6 | 1993-11-15 |
| 696 | Hanks, T. R. | 38 | — | 2 | 1979-09-10 |
| 697 | Knierim, James Richard | 38 | — | 2 | 1980-12-01 |
| 698 | Matherly, Lonnie | 38 | — | 10 | 1981-04-18 |
| 699 | Neely&schimelpfening | 38 | — | 4 | 1955-12-01 |
| 700 | Potts Brothers | 37 | — | 3 | 1964-08-01 |
| 701 | Tim Hacker | 37 | — | 6 | 2006-11-20 |
| 702 | Brooks, Rollin W. | 37 | — | 9 | 1975-09-17 |
| 703 | Coad Well & Pump Co. | 37 | — | 4 | 1992-05-01 |
| 704 | Randa WM J | 37 | — | 1 | 1960-01-01 |
| 705 | Perrine William | 37 | — | 1 | 1962-01-01 |
| 706 | Barker, Paul | 37 | — | 4 | 1977-07-30 |
| 707 | J & R Well Drlg. | 36 | — | 9 | 1996-07-08 |
| 708 | Brotcke Engineering | 35 | — | 12 | 2003-08-16 |
| 709 | Jeff Crank % Harriss Drilling | 35 | — | 2 | 2003-09-22 |
| 710 | Norton, William H. | 35 | — | 3 | 1997-08-31 |
| 711 | Gingerich Well | 35 | — | 4 | 1995-09-19 |
| 712 | Lyons G A | 35 | — | 3 | 1949-01-01 |
| 713 | Gray Well Drlg | 35 | — | 8 | 1940-07-01 |
| 714 | Eastern Petroleum Company | 35 | — | 1 | 1971-08-01 |
| 715 | Hutchings, James A. | 35 | — | 2 | 1995-05-01 |
| 716 | Phillip Services (Env.) | 34 | — | 2 | 2001-10-17 |
| 717 | Ziegler, Bryan C | 34 | — | 5 | 1982-11-17 |
| 718 | Swanson Well & Pump Serv | 34 | — | 5 | 1995-09-14 |
| 719 | Tyler, John | 34 | — | 2 | 1965-08-01 |
| 720 | Mccaskey, H. | 34 | — | 2 | 1944-01-01 |
| 721 | Lenhart, Jeff Plumbing | 34 | — | 2 | 2008-02-13 |
| 722 | Austin, Harry | 34 | — | 1 | 1946-01-01 |
| 723 | Neely & Son | 34 | — | 1 | 1967-05-01 |
| 724 | John E. Liberg | 34 | — | 4 | 2000-05-16 |
| 725 | Hinkle J | 34 | — | 2 | 1976-10-01 |
| 726 | Huemann, John | 34 | — | 4 | 2015-09-25 |
| 727 | Gritzner, Edward John | 34 | — | 2 | 1985-05-08 |
| 728 | Madsen, Charles & Sons | 34 | — | 1 | 1953-01-01 |
| 729 | IL State Water Survey | 33 | — | 19 | 2003-06-05 |
| 730 | Toops, Floyd | 33 | — | 2 | 1980-09-01 |
| 731 | Groves, Alan | 33 | — | 4 | 1994-05-02 |
| 732 | Winslow Drilling | 33 | — | 4 | 1972-02-24 |
| 733 | Roe, Ronald | 33 | — | 4 | 2018-07-18 |
| 734 | Murdoch, James J. | 33 | — | 5 | 1992-06-10 |
| 735 | Kramer, Claude E. | 33 | — | 1 | 1946-03-07 |
| 736 | Stanley, Charles Joseph | 33 | — | 2 | 2000-11-14 |
| 737 | Livingston, William B. | 33 | — | 4 | 1976-10-15 |
| 738 | Buchanan, Ruben C. | 32 | — | 4 | 1972-10-23 |
| 739 | Woodward, L. E. | 32 | — | 2 | 1972-07-11 |
| 740 | Mumma Drilling Inc. | 32 | — | 1 | 1977-09-20 |
| 741 | Whiston, George Jr. | 32 | — | 4 | 1990-06-15 |
| 742 | Bush, Richard W. | 32 | — | 6 | 1990-09-14 |
| 743 | Neupert, Thomas A. | 32 | — | 9 | 1989-05-09 |
| 744 | Denison, Gary S. | 32 | — | 1 | 1984-11-13 |
| 745 | Knierim James Muelle | 32 | — | 4 | 1980-12-01 |
| 746 | Varner Well Drilling | 32 | — | 10 | 1953-09-01 |
| 747 | Joliet Pump Co. | 32 | — | 2 | 1962-01-01 |
| 748 | Miles, Randolph S. | 32 | — | 1 | 1978-10-20 |
| 749 | Haverstick Well & Equp | 31 | — | 9 | 1964-02-01 |
| 750 | Klein, Paul Steve | 31 | — | 2 | 1995-04-26 |
| 751 | James Layten | 31 | — | 5 | 2006-09-01 |
| 752 | Ebert, Chris Drilling | 31 | — | 2 | 1974-06-01 |
| 753 | Hinrichs, Shane M. | 31 | — | 3 | 2020-09-29 |
| 754 | Niffeneger, Edward L. | 31 | — | 4 | 1995-12-05 |
| 755 | Beaman, John | 31 | — | 1 | 1976-10-01 |
| 756 | Ferguson, F. H. | 31 | — | 1 | 1918-01-01 |
| 757 | Brotcke, Paul | 30 | — | 13 | 1999-09-11 |
| 758 | Biggerstaff, Dr. James | 30 | — | 1 | 1978-07-01 |
| 759 | Relander, August | 30 | — | 1 | 1933-01-01 |
| 760 | Ayrshire Collieries Corp | 30 | — | 1 | 1946-11-01 |
| 761 | Bilsky, J. W. | 30 | — | 1 | 1970-03-21 |
| 762 | Keen, George E. | 29 | — | 9 | 1995-04-25 |
| 763 | Geer, Alonzo W. | 29 | — | 4 | 1974-06-28 |
| 764 | Calhoun Drlg. Co. | 29 | — | 6 | 1983-08-01 |
| 765 | Whiston, George N. | 29 | — | 5 | 1978-07-18 |
| 766 | List, Todd | 29 | — | 7 | 2020-07-24 |
| 767 | Dudley Drillers | 29 | — | 5 | 1971-02-11 |
| 768 | Chadwick, G. W. | 29 | — | 8 | 1979-10-20 |
| 769 | Schmeiser Kenneth S | 29 | — | 4 | 1974-09-10 |
| 770 | Lutes Orville & Sons | 29 | — | 4 | 1974-02-09 |
| 771 | Bill Sosnowski | 29 | — | 3 | 1999-08-23 |
| 772 | Snelton, Cornelius | 29 | — | 2 | 1942-01-01 |
| 773 | Sigrist, Charlie F. | 29 | — | 2 | 1972-01-01 |
| 774 | Hanks, Thomas R. | 28 | — | 3 | 1978-08-24 |
| 775 | Bekemeyer, Gustav F. | 28 | — | 4 | 1975-07-01 |
| 776 | Woodward, Lawrence F. | 28 | — | 5 | 1978-09-01 |
| 777 | Mumma Bros Drilling Inc. | 28 | — | 5 | 2002-06-26 |
| 778 | Rediger, Dan | 28 | — | 5 | 1979-08-20 |
| 779 | York, Warren T. | 28 | — | 1 | 1969-12-20 |
| 780 | Teeple C F | 28 | — | 2 | 1949-01-01 |
| 781 | Johnson, Joel H | 28 | — | 2 | 2019-12-31 |
| 782 | Neidig Brothers | 28 | — | 1 | 1941-01-01 |
| 783 | Neely Cliff L | 28 | — | 5 | 1968-09-01 |
| 784 | Schlesser & Sons | 28 | — | 3 | 1949-07-01 |
| 785 | Caper, Garland | 28 | — | 4 | 1973-03-14 |
| 786 | Adkins, Phillip G. | 28 | — | 4 | 1998-08-25 |
| 787 | Warth, Bill | 27 | — | 4 | 1992-09-22 |
| 788 | Texaco, Inc. | 27 | — | 9 | 1983-10-29 |
| 789 | Harmon, Bill | 27 | — | 3 | 1980-03-01 |
| 790 | Walter Hatton | 27 | — | 1 | 1972-06-09 |
| 791 | Ben D Ruble | 27 | — | 1 | 1963-05-21 |
| 792 | Eaton, Virgil | 27 | — | 2 | 1958-09-01 |
| 793 | Tegeler, Brian J. | 27 | — | 12 | 2012-06-26 |
| 794 | Eaton, Zane C. Jr. | 27 | — | 8 | 1984-12-12 |
| 795 | Hoyle Well & Pump | 27 | — | 3 | 1979-12-05 |
| 796 | Martin, Jonas | 27 | — | 7 | 1992-07-14 |
| 797 | Neely & Etal | 27 | — | 3 | 1946-07-01 |
| 798 | John J. Thompson | 27 | — | 2 | 1996-12-02 |
| 799 | Twigg Brothers | 27 | — | 1 | 1943-06-01 |
| 800 | Mcellhiney Wm. Sr. | 26 | — | 8 | 1979-05-01 |
| 801 | Holdorf Donald | 26 | — | 3 | 1969-11-01 |
| 802 | Wills, Elmer D. | 26 | — | 3 | 1995-09-11 |
| 803 | Leasure, Arthur C. | 26 | — | 4 | 1998-10-18 |
| 804 | Well Co. Well & Pump | 26 | — | 5 | 2010-01-05 |
| 805 | Stone, H. I. | 26 | — | 3 | 1976-05-01 |
| 806 | Midwest Well Drlg | 26 | — | 1 | 1959-01-01 |
| 807 | Fondaw, Bill | 25 | — | 6 | 2009-01-09 |
| 808 | Sandefur, Donald E. | 25 | — | 8 | 1986-11-25 |
| 809 | Shell Oil Company | 25 | — | 8 | 1966-01-01 |
| 810 | Hayes | 25 | — | 3 | — |
| 811 | Water Well Solutions | 25 | — | 10 | 2011-11-23 |
| 812 | Dowell, S. L./Shadow Mfg. | 25 | — | 4 | 1996-11-21 |
| 813 | Natural Gas Pipeline Co. OF America | 25 | — | 3 | 2008-12-11 |
| 814 | Shoemaker, Cole | 25 | — | 4 | 1996-01-31 |
| 815 | Blankenship, Bill | 25 | — | 9 | 2016-12-10 |
| 816 | K & K Oil, Inc. | 25 | — | 8 | 1975-03-01 |
| 817 | Jenson Kenneth | 25 | — | 1 | 1983-03-16 |
| 818 | Shane M. Hinrichs | 25 | — | 2 | 2006-07-18 |
| 819 | Schlesser F & Sons | 25 | — | 3 | 1948-12-31 |
| 820 | James Harding | 25 | — | 3 | 1993-12-28 |
| 821 | Gorlo, E. R. | 25 | — | 1 | 1960-01-01 |
| 822 | Raney, Sherman L. | 25 | — | 2 | 1980-11-12 |
| 823 | Madsen, Wilbur C. | 25 | — | 2 | 1986-02-13 |
Best well drillers by county
County-level rankings — who actually drills where, by wells on record.
- Adams County (33)
- Alexander County (25)
- Bond County (31)
- Boone County (95)
- Brown County (15)
- Bureau County (72)
- Calhoun County (24)
- Carroll County (79)
- Cass County (50)
- Champaign County (94)
- Christian County (65)
- Clark County (52)
- Clay County (39)
- Clinton County (59)
- Coles County (56)
- Cook County (178)
- Crawford County (50)
- Cumberland County (42)
- Dekalb County (124)
- Dewitt County (62)
- Douglas County (51)
- Dupage County (156)
- Edgar County (41)
- Edwards County (23)
- Effingham County (42)
- Fayette County (49)
- Ford County (59)
- Franklin County (20)
- Fulton County (63)
- Gallatin County (43)
- Greene County (48)
- Grundy County (103)
- Hamilton County (27)
- Hancock County (32)
- Hardin County (21)
- Henderson County (49)
- Henry County (100)
- Iroquois County (90)
- Jackson County (41)
- Jasper County (46)
- Jefferson County (33)
- Jersey County (39)
- Jo Daviess County (61)
- Johnson County (28)
- Kane County (180)
- Kankakee County (82)
- Kendall County (113)
- Knox County (57)
- Lake County (157)
- Lasalle County (149)
- Lawrence County (35)
- Lee County (113)
- Livingston County (102)
- Logan County (84)
- Macon County (73)
- Macoupin County (43)
- Madison County (72)
- Marion County (33)
- Marshall County (65)
- Mason County (72)
- Massac County (27)
- Mcdonough County (47)
- Mchenry County (193)
- Mclean County (89)
- Menard County (59)
- Mercer County (61)
- Monroe County (50)
- Montgomery County (55)
- Morgan County (52)
- Moultrie County (42)
- Ogle County (131)
- Peoria County (109)
- Perry County (16)
- Piatt County (51)
- Pike County (56)
- Pope County (25)
- Pulaski County (24)
- Putnam County (55)
- Randolph County (45)
- Richland County (40)
- Rock Island County (85)
- Saline County (22)
- Sangamon County (61)
- Schuyler County (49)
- Scott County (38)
- Shelby County (57)
- St. Clair County (69)
- Stark County (48)
- Stephenson County (69)
- Tazewell County (107)
- Union County (29)
- Vermilion County (81)
- Wabash County (28)
- Warren County (49)
- Washington County (38)
- Wayne County (40)
- White County (40)
- Whiteside County (90)
- Will County (132)
- Williamson County (23)
- Winnebago County (120)
- Woodford County (82)
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