Oil & Gas Companies in Wharton County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | O'Tool Oil & Gas, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 2 | Oblaen Resources LLC | Wallis, TX 77485 | Oil & Gas Operator | Dec 2025 |
| 3 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 4 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 5 | Omega Energy, LLC | Corpus Chrsti, TX 78418 | Oil & Gas Operator | Dec 2025 |
| 6 | Opal Energy, Inc. | Katy, TX 77494 | Oil & Gas Operator | Jun 2009 |
| 7 | Opex Energy, LLC | Houston, TX 77042 | Oil & Gas Operator | Mar 2008 |
| 8 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Dec 2025 |
| 9 | Osr Oil & Gas Company | Victoria, TX 77902 | Oil & Gas Operator | Jul 2000 |
| 10 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
| 11 | Owl Creek Production Co., LLC | Denver, CO 80265 | Oil & Gas Operator | Jan 2006 |
| 12 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
Production numbers shown above are only for Wharton County, TX and for the production period listed.