Oil & Gas Companies in Union Parish, LA
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 2 | O'Brien Operating Company | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2004 |
| 3 | O. B. Mobley | | Oil & Gas Operator | Jul 1989 |
| 4 | O. O. Cummings | | Gas Operator | Jan 1999 |
| 5 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 6 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 7 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 8 | Offshore Shelf LLC | | Oil & Gas Operator | Dec 2007 |
| 9 | Oliditt Corporation | | Gas Operator | Mar 2022 |
| 10 | Opal Oil Inc. | | Oil Operator | Sep 2021 |
| 11 | Ora Oil Company | | Oil & Gas Operator | May 2017 |
| 12 | Ouachita Development Corp. | | Gas Operator | Mar 2014 |
| 13 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
Production numbers shown above are only for Union Parish, LA and for the production period listed.