| Joy Elizabeth DeJong Lago | Ph.D. | Yes | | 18+ | | |
| Dean C. Delis | Ph.D. | Yes | | Children and adults | | |
| George Demakis | Ph.D. | Yes | | 18+ | | |
| Kristen Demertzis | Ph.D. | Yes | | 16+ | | |
| Jason A. Demery | Ph.D. | Yes | | 16-100 | | |
| Petya D Demireva | Ph.D. | Yes | | 18-90+ | | |
| Robert L. Denney | Psy.D. | Yes | | Adults | | |
| Brandon C Dennis | Psy.D. | Yes | | 18+ | | |
| Katherine Grace Denny | Ph.D. | Yes | | | | |
| Nicholas J DePrima | Psy.D. | Yes | | 18+ | | |
| Katherine Derbyshire | Ph.D. | Yes | | 18+ | | |
| Jonathan DeRight | Ph.D. | Yes | | 15+ | - District of Columbia
- Maryland
- Virginia
| |
| Thomas J. Deters | Ph.D. | Yes | | | - Massachusetts
- New Hampshire
| |
| Gayle Deutsch | Ph.D. | Yes | | Ages 6 through older adults | | |
| Gennaro M. DiCarlo | Psy.D. | Yes | | children, adolescents, and young adults | | |
| Mercedes Dickinson | Ph.D. | Yes | | | | |
| Sid Dickson | Ph.D. | Yes | | 16+ | | |
| Bridget M Doane | Ph.D. | Yes | | 18+ through Geriatric | | |
| Jonathan N. Dodd | Psy.D. | Yes | | 3 year - 80 years | | |
| Carl B. Dodrill | Ph.D. | No | | | | |
| Christopher Domen | Ph.D. | Yes | | | | |
| Jacobus A. M. Donders | Ph.D. | Yes | | Toddler through Geriatric | | |
| Nicholas A. Doninger | Ph.D. | Yes | | 18 - 90s | | |
| Alison J Donnell | Ph.D. | Yes | | | | |
| Kerry Donnelly | Ph.D. | Yes | | 18 and up | | |