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St. Clair County, IL oil and gas wells
1,650 wells: 0 active, 919 plugged, run by 437 operators.
Figures from the Illinois State Geological Survey, updated 2026-10-17.
Top operators in St. Clair
| Operator | Active | Wells here |
|---|
| Illinois Power Co. | 0 | 122 |
| Canonie Construction Co. | 0 | 100 |
| IL State Geological Survey | 0 | 100 |
| Sun Production Co (Sun Oil) | 0 | 85 |
| McMenamy, B. Contr., Inc | 0 | 72 |
| Ohio Oil Co., The | 0 | 70 |
| Mountain Engineering&Co. | 0 | 54 |
| Donnewald, James H. | 0 | 30 |
| McCandlish and Gwaltney Drlng. | 0 | 26 |
| Ameren Illinois Company | 0 | 25 |
| Sun Production Co.(Sun Oil) | 0 | 21 |
| Calvert Funds, Inc. | 0 | 20 |
| Ohio Oil Company | 0 | 16 |
| Tarlton Oil Co | 0 | 16 |
| Geo-Mechanics, Inc. | 0 | 13 |
| Oelze, Elmer Jr. | 0 | 13 |
| Young C W | 0 | 13 |
| Larson Industries, Inc. | 0 | 12 |
| Podolsky Oil Co. | 0 | 12 |
| Alco Oil & Gas Corp. | 0 | 11 |
| Geotechnology | 0 | 11 |
| Loveridge, F. R., Etal | 0 | 11 |
| Kerwin, Thomas R. | 0 | 10 |
| Magnolia Petroleum Company | 0 | 10 |
| Excel Energy Company | 0 | 9 |
Wells
Not plugged · All wells · Plugged · Orphaned