Oil & Gas Companies in Washington County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | E P C Oil & Gas, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2025 |
| 2 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 3 | Eagle Valley Development LLC | Austin, TX 78738 | Oil & Gas Operator | Oct 2023 |
| 4 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 5 | Elliott Oil & Gas Operating Co. | Magnolia, TX 77354 | Oil & Gas Operator | Oct 2025 |
| 6 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2025 |
| 7 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |
| 8 | Energy Resource Management, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 9 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | May 2025 |
| 10 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 11 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 12 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 13 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 14 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 15 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 16 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 17 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for Washington County, TX and for the production period listed.