| Business | Phone |
| American Red Cross 150 Main St # 104, Prince Frederick 20678 | (410) 535-5230 |
| Association-Retarded Citizens 268 Merrimac Ct, Prince Frederick 20678 | (410) 535-2413 |
| Big Brothers & Big Sisters 530 Main St, Prince Frederick 20678 | (410) 535-1115 |
| Calvert Crusade For Children 530 Main St, Prince Frederick 20678 | (410) 286-8300 |
| Catholic Charities 440 Main St, Prince Frederick 20678 | (410) 535-0309 |
| Family Coordination Ctr-Prince 3695 Hallowing Point Rd # 3, Prince Frederick 20678 | (410) 414-9112 |
| Healthy Families Of Calvert 530 Main St, Prince Frederick 20678 | (410) 535-6941 |
| Susan E Shaw 65 Duke St, Prince Frederick 20678 | (410) 257-6282 |
| United Way 530 Main St, Prince Frederick 20678 | (410) 286-0100 |