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Cook County, IL oil and gas wells
526 wells: 0 active, 1 plugged, run by 52 operators.
Figures from the Illinois State Geological Survey, updated 2026-10-17.
Top operators in Cook
| Operator | Active | Wells here |
|---|
| Illinois State Geological Survey | 0 | 70 |
| IL State Geological Survey | 0 | 53 |
| KeiferAssociates | 0 | 25 |
| Northern Illinois Gas Co. | 0 | 24 |
| IL State Geol Survey | 0 | 9 |
| ConeTec, Inc. | 0 | 8 |
| Steven Baumann | 0 | 8 |
| Continental Drilling Company | 0 | 6 |
| Harza Engineering Co. | 0 | 5 |
| IL Dept. of Transportation | 0 | 4 |
| Miller, J. P. Art. Well | 0 | 4 |
| U. S. Geological Survey | 0 | 4 |
| D & G Drilling Co., Inc. | 0 | 3 |
| Foyle, Bert | 0 | 3 |
| Geiger, S. B. | 0 | 3 |
| Miller, J.P. Co. | 0 | 3 |
| Snelten, Cornelius, BA | 0 | 3 |
| Snelton Brothers | 0 | 3 |
| Wang Engineering | 0 | 3 |
| ISGS | 0 | 2 |
| Layne Western Co., Inc. | 0 | 2 |
| Layne-Western Co. | 0 | 2 |
| Miller, J. P. Art, Wells | 0 | 2 |
| Snelton Bros. | 0 | 2 |
| Southern Triangle Oil Company | 0 | 2 |
Wells
Not plugged · All wells · Plugged · Orphaned