| Hannah L Combs | Ph.D. | Yes | | 18 and older | | |
| Amy Kiernan Conrad | Ph.D. | Yes | | Adults | | |
| Ciaran Michael Considine | Ph.D. | Yes | | 18+ | | |
| Christopher P. Contardo | Ph.D. | Yes | | 18+ | | |
| Sarah E Cook | Ph.D. | Yes | | 16+ | | |
| Douglas B. Cooper | Ph.D. | Yes | | 18+ | | |
| Shanna Cooper | Ph.D. | Yes | | 18+ | - California
- Oregon
- Washington
| |
| Christopher Copeland | Ph.D. | Yes | | | | |
| Jacquelynn N Copeland | Ph.D. | No | | Adults | | |
| Denise D. Correa | Ph.D. | Yes | | 18 years and above | | |
| Jeffrey Cory | Ph.D. | Yes | | 6 and over | - California
- Colorado
- Montana
- Utah
| |
| Louis D. Costa | Ph.D. | No | | | | |
| Maria Easter Cottingham | Ph.D. | Yes | | | | |
| Darcy Cox | Psy.D. | Yes | | adult-older adult | | |
| Paul L. Craig | Ph.D. | Yes | | | | |
| Lloyd I. Cripe | Ph.D. | No | | | | |
| Mary Healy Cristiano | Psy.D. | Yes | | | | |
| Edan Andrew Critchfield | Psy.D. | Yes | | 18+ | | |
| Jennifer Renee Cromer | Ph.D. | Yes | | 18+ | | |
| John Crouch | Ph.D. | Yes | | Adult, Geriatric | | |
| Thomas Crum | Ph.D. | Yes | | Adult | | |
| Munro Cullum | Ph.D. | Yes | | Adult and geriatric | | |
| Joseph M. Cunningham | Ph.D. | Yes | | | | |
| Tanya J. (Schwartz) D'Avanzo | Ph.D. | Yes | | | | |
| John J. Dabrowski | Ph.D. | Yes | | 6 to 90 + | | |