Oil & Gas Companies in Kansas
| Company Name | Company Location | Company Type | Most Recent Production |
| 401 | Cullison, Jimmie I. | Moscow, KS 67952 | Oil Operator | Apr 2002 |
| 402 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 403 | Culver & Grounds Oil Properties, Inc. | McPherson, KS 67460 | Oil Operator | Jun 2025 |
| 404 | Cunningham Crude, A General Partnership | Independence, KS 67301 | Oil Operator | Jun 2025 |
| 405 | Cunningham, Melvin | Medicine Lodge, KS 67104 | Oil Operator | Jan 2013 |
| 406 | Curry Oil | | Oil Operator | May 2005 |
| 407 | Curry, Gregg | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 408 | Curt'S Oil Opera | | Oil Operator | Nov 1994 |
| 409 | Curt'S Oil Operation, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |
| 410 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 411 | Cutler Oil, LLC | Rantoul, KS 66079 | Oil Operator | May 2025 |
| 412 | CWB Oil Company, LLC | St. Francis, KS 67756 | Oil Operator | Jun 2025 |
| 413 | Cycle Oil & Gas LTD | | Gas Operator | Jun 2025 |
| 414 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 415 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Jun 2025 |
Production numbers shown above are only for Kansas and for the production period listed.