Oil & Gas Companies in Franklin County, KS
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | C & R Well Servi | | Oil Operator | Sep 1996 |
| 2 | C & R Well Service, A General Partnership | Garnett, KS 66032 | Oil Operator | Dec 2009 |
| 3 | C D Oil | Wellsville, KS 66092 | Oil Operator | Aug 1998 |
| 4 | C F Oil - Frazie | | Oil Operator | Dec 1994 |
| 5 | C. D. Oil, Inc. | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 6 | C. F. Oil, A General Partnership | Lake Lotawana, MO 64086 | Oil Operator | Jun 2025 |
| 7 | Captain'S Oil Inc. | Louisburg, KS 66053 | Oil Operator | Sep 2003 |
| 8 | Cherokee Oil | | Oil Operator | Jun 2025 |
| 9 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 10 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Jun 2025 |
| 11 | Colt Energy Inco | | Oil & Gas Operator | Dec 1996 |
| 12 | Continental Expl | | Oil Operator | Sep 1991 |
| 13 | Cris Oil | | Oil Operator | May 2025 |
| 14 | Crude Kin Oil Company, Inc. | Louisburg, KS 66053 | Oil Operator | Jun 2025 |
| 15 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | May 2025 |
Production numbers shown above are only for Franklin County, KS and for the production period listed.