| Fighter | Record | Last Bout |
|---|---|---|
| Gil Castillo | 8-5-0 | 2002-11-22 |
| Guido Cannetti | 10-8-0 | 2023-03-11 |
| Hailey Cowan | 7-6-0 | 2026-08-01 |
| Hannah Cifers | 10-7-0 | 2020-08-29 |
| Heather Clark | 7-6-0 | 2016-11-05 |
| Henry Cejudo | 16-6-0 | 2025-12-06 |
| Ion Cutelaba | 20-12-1 (1 NC) | 2026-06-20 |
| JC Cottrell | 17-5-0 | 2017-01-28 |
| Jacqueline Cavalcanti | 10-2-0 | 2026-05-16 |
| Jake Collier | 13-10-0 | 2023-09-23 |
| Jared Cannonier | 18-10-0 | 2026-07-18 |
| Jay Cucciniello | 8-1-0 | 2018-07-06 |
| Jeff Cox | 10-7-0 | 2008-04-02 |
| Jeff Curran | 36-18-1 | 2012-05-15 |
| Jeisla Chaves | 8-1-0 | 2026-08-22 |
| Jessica-Rose Clark | 11-9-0 (1 NC) | 2023-05-13 |
| Jimmy Crute | 14-4-2 | 2025-09-27 |
| Joachim Christensen | 14-6-0 | 2017-06-25 |
| Joe Charles | 6-13-0 | 1997-12-21 |
| John Campetella | 0-1-0 | 1996-07-12 |
| John Castaneda | 21-8-1 | 2026-09-26 |
| John Cholish | 8-3-0 | 2013-05-18 |
| John Cofer | 8-4-0 | 2012-12-15 |
| Johnny Case | 22-6-0 | 2017-06-25 |
| Josh Clopton | 6-2-1 | 2013-08-03 |
| Josh Copeland | 12-4-0 | 2015-03-14 |
| Josh Culibao | 11-4-1 | 2024-08-17 |
| Kailin Curran | 4-5-0 | 2017-11-25 |
| Katlyn Cerminara | 18-6-0 | 2026-10-17 |
| Kevin Casey | 9-5-2 (2 NC) | 2016-08-27 |
| Kevin Christian | 9-4-0 | 2026-05-02 |
| Kevin Croom | 21-15-0 (1 NC) | 2022-04-16 |
| Khamzat Chimaev | 15-1-0 | 2026-05-09 |
| Kiefer Crosbie | 10-6-0 | 2025-08-23 |
| Kit Cope | 6-7-0 | 2005-11-05 |
| Kurtis Campbell | 9-1-0 | 2026-09-05 |
| Larry Cureton | 0-2-0 | 1995-09-08 |
| Laverne Clark | 27-21-1 | 2000-09-22 |
| Levan Chokheli | 15-3-0 (1 NC) | 2026-06-20 |
| Liu Ce | 4-1-0 | 2026-08-29 |
| Liz Carmouche | 13-7-0 | 2019-08-10 |
| Logan Clark | 18-6-0 | 2006-12-13 |
| Louis Cosce | 7-2-0 | 2022-09-17 |
| Luan Chagas | 15-3-1 | 2018-04-21 |
| Luana Carolina | 11-5-0 | 2025-09-27 |
| Luiz Cane | 17-7-0 (1 NC) | 2012-10-13 |
| Luke Caudillo | 17-17-0 | 2007-11-17 |
| Luke Cummo | 6-6-0 | 2008-08-09 |
| Macy Chiasson | 11-6-0 | 2026-02-28 |
| Magnus Cedenblad | 14-5-0 | 2016-11-19 |