Oil & Gas Companies in Callahan County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | O.G.O. Refining | Luling, TX 78648 | Oil & Gas Operator | Jun 2013 |
| 2 | Oakridge Energy, Inc. | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 3 | Ohlhausen Oil Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 4 | Okreek Oil Company | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 5 | Orth Oil Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 6 | Ouida Oil | Rowlett, TX 75030 | Oil & Gas Operator | Mar 2008 |
| 7 | Overland Operating Company, LLC | Abilene, TX 79601 | Oil Operator | Oct 2025 |
| 8 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for Callahan County, TX and for the production period listed.