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Marion County, IL oil and gas wells
10,480 wells: 0 active, 4,514 plugged, run by 1,304 operators.
Figures from the Illinois State Geological Survey, updated 2026-10-17.
Top operators in Marion
| Operator | Active | Wells here |
|---|
| Texas Company, The | 0 | 1,489 |
| Texaco, Inc. | 0 | 1,413 |
| The Texas Company | 0 | 979 |
| Magnolia Petroleum Company | 0 | 535 |
| Citation Oil & Gas Corp. | 0 | 338 |
| Texas Co., The | 0 | 238 |
| Texas Company | 0 | 130 |
| Ohio Oil Co., The | 0 | 128 |
| Ego Oil Company | 0 | 117 |
| National Associated Petroleum Co. | 0 | 107 |
| Shell Oil Company | 0 | 101 |
| Ceja Corporation | 0 | 99 |
| Adams Oil & Gas | 0 | 89 |
| Southwestern Oil & Gas | 0 | 85 |
| Felmont Corporation | 0 | 81 |
| Kingwood Oil Co. | 0 | 68 |
| Deep Rock Energy Corp. | 0 | 63 |
| Sohio Petroleum Company | 0 | 61 |
| Lippert, Marshall | 0 | 60 |
| Ohio Oil Company | 0 | 51 |
| Reeves, E.C. Estate of | 0 | 48 |
| Texaco Exploration & Producing, Inc | 0 | 47 |
| Shakespeare Oil Co. | 0 | 44 |
| Conrey, T. M. | 0 | 42 |
| Oelze, Elmer Jr. | 0 | 40 |
Wells
Not plugged · All wells · Plugged · Orphaned
| Well | API / ID | Status | Type | Operator |
|---|
| No wells match. |