Oil & Gas Companies in McMullen County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | U.S. Enercorp, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2004 |
| 2 | U.S. Enercorp, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2019 |
| 3 | U.S.A. Plugging Company | Pearsall, TX 78061 | Oil & Gas Operator | Oct 2025 |
| 4 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Oct 2025 |
| 5 | Umma Resources, LLC | Portland, TX 78374 | Gas Operator | Oct 2025 |
| 6 | Union Gas Operating Company | Houston, TX 77014 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for McMullen County, TX and for the production period listed.