Oil & Gas Companies in Hardin County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 2 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 3 | Union Crude Operating Co. | Baytown, TX 77521 | Oil Operator | Aug 2003 |
| 4 | Union Gas Operating Company | Houston, TX 77014 | Oil & Gas Operator | Oct 2025 |
| 5 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 6 | Union Seaboard Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 7 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 8 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
| 9 | Universal Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2002 |
| 10 | Upstream Exploration LLC | Metairie, LA 70002 | Oil & Gas Operator | Jan 2020 |
Production numbers shown above are only for Hardin County, TX and for the production period listed.