| Arcadia Health Care | San Jose | California | 408-248-3360 |
| Area Developmental Disabilities Board VII | San Jose | California | 408-324-2106 |
| Arkansas Disability Coalition | Little Rock | Arkansas | 501-614-7020 |
| Arlene Bell, Attorney | Santa Monica | California | 310-829-2029 |
| Art for Well Beings | Palo Alto | California | 650-776-8297 |
| Art Without Boundaries | Redwood City | California | 650-766-8538 |
| Arthritis Foundation - Northern California Chapter | San Francisco | California | 800-464-6240 |
| As Children Blossom Therapy Center | Campbell | California | 408-866-4700 |
| ASD Lifeline Program | Los Gatos | California | 408-399-5128 |
| Asian Americans for Community Involvement | San Jose | California | 408-975-2730 |
| Asian Pacific Family Resource Center | San Jose | California | 408-299-1500 |
| ASLdeafined - Interactive Website for American Sign Language | Auburn Hills | Michigan | 248-275-9728 |
| Aspen Education Group | Cerritos | California | 562-467-5517 |
| Aspergers Resource | Walnut Creek | California | |
| Aspergers Support Group - Dublin | San Ramon | California | 925-426-9219 |
| Aspira Foster Family Services - Headquarters | South San Francisco | California | 800-439-1905 |
| Assistive Technology Network | Sacramento | California | 916-325-1690 |
| Assistive Technology Resource Centers of Hawaii (ATRC) | Honolulu | Hawaii | 808-532-7110 |
| Association for Chinese Families of the Disabled - ACFD | San Francisco | California | 415-392-4453 |
| Association for Special Children & Families | Hewitt | New Jersey | 973-728-8744 |