Oil & Gas Companies in Allen County, KS
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | R J Enterprises | Farmington, NM 874990051 | Oil Operator | Mar 2021 |
| 2 | RCS Oil | | Oil Operator | Jun 2025 |
| 3 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Jun 2025 |
| 4 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 5 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 6 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 7 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 8 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Jun 2025 |
| 9 | Rocky Road Oil Company | | Oil Operator | May 2024 |
| 10 | Rodriguez, Everado | Paola, KS 66071 | Oil Operator | Mar 2021 |
| 11 | Rogers Oil Co. | Bronson, KS 66716 | Oil & Gas Operator | Sep 1995 |
| 12 | Ron-Bob Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jun 2025 |
| 13 | Roxanna Pipeline, Inc. | Dallas, TX 75206 | Oil & Gas Operator | May 2010 |
| 14 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 15 | Russell James E | | Oil Operator | Apr 1994 |
Production numbers shown above are only for Allen County, KS and for the production period listed.