Oil & Gas Companies in Haskell County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 2 | Edington Oil Company | Albany, TX 76430 | Oil & Gas Operator | Aug 2006 |
| 3 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 4 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 5 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 7 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 8 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 9 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 10 | Erwin, James D. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1993 |
| 11 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 12 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 13 | Excel Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 14 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jun 2025 |
| 15 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 16 | Extech Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2025 |
| 17 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
Production numbers shown above are only for Haskell County, TX and for the production period listed.