Best well drillers in Jefferson County, Illinois
Not a pay-to-play list: these are the 33 drilling companies with wells on record in Jefferson County, ranked by wells actually drilled here — 569 logged wells in the Illinois State Geological Survey water well records (records as of 2026-08-20). Every number links back to the public record.
| # | Company | In Jefferson Co. since 2016 | All-time in county | Statewide |
|---|---|---|---|---|
| 1 | Kohnen, Clarence | — | 225 | 12,561 |
| 2 | Wilson, Olen L. | — | 97 | 785 |
| 3 | Woodward, Lawrence | — | 48 | 388 |
| 4 | Geer, James A. | — | 46 | 460 |
| 5 | Wilson, Deneal | — | 29 | 600 |
| 6 | Keen, George | — | 28 | 176 |
| 7 | Brady, C.e. | — | 28 | 75 |
| 8 | Woodward, Larry A. | — | 11 | 60 |
| 9 | Keen, Bradley E. | — | 9 | 288 |
| 10 | Kelly Drilling Co. | — | 9 | 28 |
| 11 | Buchanan, Ruben C. | — | 7 | 30 |
| 12 | Hepp, Frank D. Jr. | — | 3 | 684 |
| 13 | Kohnen, Clarence E. | — | 3 | 159 |
| 14 | Kelley, A.g. | — | 3 | 28 |
| 15 | Woodward, Lawrence F. | — | 3 | 28 |
| 16 | Keen, George E. | — | 3 | 27 |
| 17 | Speth, James | — | 1 | 1,113 |
| 18 | Beckett, Donald | — | 1 | 655 |
| 19 | Lutes, George W. | — | 1 | 650 |
| 20 | Gwin Drilling Co. | — | 1 | 477 |
| 21 | Sloan, Thomas F. | — | 1 | 448 |
| 22 | Sergent, William E. | — | 1 | 249 |
| 23 | Arron Baum | — | 1 | 223 |
| 24 | Baum, Arron | — | 1 | 187 |
| 25 | Puckett, Arnold L. | — | 1 | 184 |
| 26 | Abbott, Albert G. | — | 1 | 162 |
| 27 | Sergent, William Eli | — | 1 | 112 |
| 28 | Pittman, Robert Dale | — | 1 | 92 |
| 29 | Pittman, Dale | — | 1 | 38 |
| 30 | Norman E D | — | 1 | 37 |
| 31 | IL State Water Survey | — | 1 | 26 |
| 32 | Texaco, Inc. | — | 1 | 25 |
| 33 | Geer, Alonzo W. | — | 1 | 25 |
Ranked by wells drilled in Jefferson County since 2016 (then all-time), from the full ISGS record. A ★ marks a featured sponsor — sponsors must appear in the county record to be listed, and the ranking below them is never reordered.
Who drills the most wells in Jefferson County?
Kohnen, Clarence leads the Jefferson County record with 225 wells all-time, though the county has little drilling activity since 2016.
How many well drilling companies work in Jefferson County?
33 companies in the ISGS record have drilled wells in Jefferson County; 0 of them have drilled somewhere in Illinois since 2022. Smaller operators below the record threshold may also serve the area.
How deep is a typical well in Jefferson County?
The median drilled depth in Jefferson County is 70 ft, based on 632 recorded wells. Depths, water levels, and yields are on the Jefferson County wells page.
Well depths, static water levels, tested yields, and drilling cost estimates for this county live on the Jefferson County wells page.
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