Best well drillers in Custer County, South Dakota
Not a pay-to-play list: these are the 40 drilling companies with wells on record in Custer County, ranked by wells actually drilled here — 2,474 logged wells in the South Dakota DANR well completion report database (NR68) (records as of 2026-10-19). Every number links back to the public record.
Ranked by wells drilled in Custer County since 2016 (then all-time), from the full SD DANR 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 Custer County?
Alexander Drilling, Inc. has drilled the most Custer County wells in the recent record — 209 since 2016, 937 in the county all-time.
How many well drilling companies work in Custer County?
40 companies in the SD DANR record have drilled wells in Custer County; 15 of them have drilled somewhere in South Dakota since 2022. Smaller operators below the record threshold may also serve the area.
How deep is a typical well in Custer County?
The median drilled depth in Custer County is 210 ft, based on 2,675 recorded wells. Depths, water levels, and yields are on the Custer County wells page.
Well depths, static water levels, tested yields, and drilling cost estimates for this county live on the Custer County wells page.
Free. Goes to licensed drillers working Custer County.
Drill in Custer County?
If your company is on this list, your profile is free to claim — confirm your details and add your contact information so Custer County property owners reach you directly.
Claim your profileFree to claim · built from SD DANR public well-log records.