Oil & Gas Companies in Hidalgo County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 2 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 3 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 4 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 5 | Ress Production Co. | Farmington, NM 87499 | Oil & Gas Operator | Oct 2025 |
| 6 | Reveille Resources | Houston, TX 77084 | Oil & Gas Operator | Apr 2011 |
| 7 | Reveille Resources (Texas), Inc. | Houston, TX 77084 | Oil & Gas Operator | Jan 2013 |
| 8 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 9 | Ricochet Energy, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Oct 2025 |
| 10 | Riddle Engineering Corp. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2011 |
| 11 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2025 |
| 12 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 13 | Riseden Services, Inc. | Houston, TX 77256 | Oil & Gas Operator | Sep 1997 |
| 14 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 15 | Rockdale Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2020 |
| 16 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 17 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for Hidalgo County, TX and for the production period listed.