Best well drillers in Warren County, Illinois
Not a pay-to-play list: these are the 48 drilling companies with wells on record in Warren County, ranked by wells actually drilled here — 1,166 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.
Ranked by wells drilled in Warren 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 Warren County?
Allen, Joseph has drilled the most Warren County wells in the recent record — 56 since 2016, 121 in the county all-time.
How many well drilling companies work in Warren County?
48 companies in the ISGS record have drilled wells in Warren County; 7 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 Warren County?
The median drilled depth in Warren County is 185 ft, based on 1,602 recorded wells. Depths, water levels, and yields are on the Warren County wells page.
Well depths, static water levels, tested yields, and drilling cost estimates for this county live on the Warren County wells page.
Free for property owners. We route your request only to licensed drillers who actually file well logs in Warren County — never sold elsewhere.
Drill in Warren County?
If your company is on this list, your profile is free to claim — confirm your details and add your contact information so Warren County property owners reach you directly.
Claim your profileFree to claim · built from ISGS public well-log records.