Oil & Gas Companies in Harmon County, OK
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Canvas Energy LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2026 |
| 2 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2026 |
| 3 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 4 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 5 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Mar 2026 |
| 6 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 7 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2025 |
| 8 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Mar 2026 |
| 9 | Perry L Larson Operating Co | Dallas, TX 75231-4712 | Oil & Gas Operator | Dec 2025 |
Production numbers shown above are only for Harmon County, OK and for the production period listed.