Oil & Gas Companies in Jefferson County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Oilex Int'L Investments, Inc. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 2 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 3 | Oklatex Energy, Inc. | Beaumont, TX 77702 | Oil Operator | Oct 2025 |
| 4 | Oleum Exploration, LLC | Brodheadsvill, PA 18322 | Oil & Gas Operator | Mar 2023 |
| 5 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Oct 2025 |
| 6 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 7 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 8 | Osborn,W.B. Oil & Gas Operations | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 9 | Outline Oil Corp. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 10 | Ows Energy, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for Jefferson County, TX and for the production period listed.