Oil & Gas Companies in Assumption Parish, LA
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 2 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 3 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 4 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 5 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 6 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 7 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Oct 2025 |
| 8 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 9 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 10 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 11 | Lyons, Hilliard & Watson, Inc. | | Oil & Gas Operator | Jan 1989 |
Production numbers shown above are only for Assumption Parish, LA and for the production period listed.