Statewide permits, drilled-but-uncompleted inventory, recent spuds, newly producing wells, and the most active operators and counties — compiled monthly from Illinois Department of Natural Resources, Office of Oil & Gas well-header records. Free to cite, quote, and embed with attribution.
Data as of · CC BY 4.0As of August 1, 2026, Illinois has 448 drilling permits filed over the trailing 24 months, 0 drilled-but-uncompleted (DUC) wells in inventory, 0 wells spudded in the last 90 days, and 0 wells brought onto first production in the last six months, across 102 producing counties — per Illinois Department of Natural Resources, Office of Oil & Gas records compiled by Buckhead Energy.
| # | Operator | Wells | Permits 24mo | DUCs |
|---|---|---|---|---|
| 1 | The Ohio Oil | 10,782 | 0 | 0 |
| 2 | Marathon Oil Company | 4,529 | 0 | 0 |
| 3 | The Texas Company | 4,094 | 0 | 0 |
| 4 | Pure Oil Company | 3,192 | 0 | 0 |
| 5 | Texaco | 2,427 | 0 | 0 |
Compiled from Illinois Department of Natural Resources, Office of Oil & Gas (IDNR) well-header and production filings: permits over a trailing 24-month window, current DUC inventory (spudded, not yet completed), spuds in the last 90 days, and wells with first production within six months. Refreshed monthly; every figure carries the as-of date above.
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Wondering whether to sell now? See Is now a good time to sell mineral rights in Illinois? — it ties this drilling data to the factors that decide timing, then routes to a free written offer.
Buckhead Energy, "Illinois Drilling Activity Report — August 2026," compiled from Illinois Department of Natural Resources, Office of Oil & Gas records, August 1, 2026. https://www.buckheadenergy.com/illinois-drilling-activity-report
Journalists and researchers: monthly figures, county-level breakdowns, and CSV extracts are available on request — [email protected].