Research · updated 2026-08-24 · download the county-level CSV
Oklahoma Well Depth & Drilling Cost Index
Drilling a private water well in Oklahoma means paying by the foot — so the two questions every well owner asks are how deep and how much. We computed both for all 77 counties with enough records to be reliable, from 135,662 official OWRB well records.
Statewide, the median well reaches 154 ft, and a complete system — drilling, casing, pump, pressure tank, and hookup — typically runs $9,600–$16,000. But the county spread is large:
Deepest counties to drill in Oklahoma
| County | Median depth | Typical depth range | Complete system |
|---|---|---|---|
| Ottawa | 395 ft | 231 ft–470 ft | $25,500–$42,500 |
| Texas | 374 ft | 300 ft–460 ft | $25,020–$41,700 |
| Delaware | 335 ft | 173 ft–425 ft | $24,000–$40,000 |
| Craig | 315 ft | 148 ft–435 ft | $21,600–$36,000 |
| Cimarron | 300 ft | 240 ft–400 ft | $24,000–$40,000 |
Most expensive counties to drill in Oklahoma
| County | Complete system | Drilling & casing only | Median depth |
|---|---|---|---|
| Ottawa | $25,500–$42,500 | $10,625–$27,625 | 395 ft |
| Texas | $25,020–$41,700 | $10,425–$27,105 | 374 ft |
| Cimarron | $24,000–$40,000 | $10,000–$26,000 | 300 ft |
| Delaware | $24,000–$40,000 | $10,000–$26,000 | 335 ft |
| Craig | $21,600–$36,000 | $9,000–$23,400 | 315 ft |
Download the full county table (CSV)
How to read this
- Depth is measured; cost is modeled. Depths are the median of recorded drilled depths per county. Cost applies published Oklahoma per-foot drilling rates to that local median depth — a planning estimate, not a quote. Actual bids vary with geology, casing, site access, and water depth.
- Counties below 30 records are excluded so a thin sample can't produce a misleading superlative.
- Records are drilling events from the state database, which include some replacement and abandoned wells; deeper counties reflect real local geology (bedrock, aquifer depth).
Sources & methodology
- Oklahoma well records: OWRB (refreshed weekly; see our general methodology).
- Percentiles (p25/median/p75) computed per county; cost from published per-foot rate ranges applied to the local median depth.
The county table is free to use with attribution to Oklahoma Well Data (oklahomawelldata.com). For a specific county, a custom cut, or the underlying records, email — usually same-day.
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