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Clark County, IL oil and gas wells
8,701 wells: 0 active, 3,744 plugged, run by 941 operators.
Figures from the Illinois State Geological Survey, updated 2026-10-17.
Top operators in Clark
| Operator | Active | Wells here |
|---|
| Ohio Oil Co., The | 0 | 1,683 |
| Forest Oil Corporation | 0 | 476 |
| Pure Oil Company | 0 | 419 |
| The Pure Oil Company | 0 | 279 |
| Associated Oil Production Co. | 0 | 169 |
| Ashley Oil, Inc. | 0 | 141 |
| Huff Drilling Co., Inc. | 0 | 106 |
| Horizontal Systems, Inc. | 0 | 105 |
| Zink, Earnest | 0 | 100 |
| Gary Energy Corp. | 0 | 89 |
| Froderman, G.H. & Connelly, Everett | 0 | 86 |
| Redman Production Co. | 0 | 84 |
| C. L. McMahon, Inc. | 0 | 79 |
| Ohio Oil Company | 0 | 75 |
| Knierim, Max Inc. | 0 | 74 |
| Dover Illinois I, LLC | 0 | 70 |
| L & J Oil & Gas, Inc. | 0 | 69 |
| Ryan, John H. | 0 | 68 |
| Bridge, Frank A. | 0 | 62 |
| Ashley Oil Company | 0 | 59 |
| Partlow Enterprises | 0 | 56 |
| Knierim Company, Inc. | 0 | 55 |
| Dillier & Knierim Co., Inc. | 0 | 53 |
| Tri-Cor Oil Producers | 0 | 47 |
| Samels | 0 | 45 |
Wells
Not plugged · All wells · Plugged · Orphaned
| Well | API / ID | Status | Type | Operator |
|---|
| No wells match. |