Intellectual Disability

Intellectual Disability (ID)

Intellectual Disability (ID) is a disability characterized by significant limitations both in intellectual functioning and in adaptive behavior as expressed in conceptual, social, and practical adaptive skills.  This disability originates before the age of 18. (Definition from the American Association on Intellectual and Developmental Disabilities)


The Arc of the United States
The Arc is the premier provider of supports and services for people with intellectual and developmental disabilities and has a demonstrable record of success in achieving the outcomes people want for their lives.
1825 K Street, NW, Suite 1200
Washington DC, 20006
Phone: 202-534-3700 / 800-433-5255
Fax: 202-534-3731
Contact form

The Arc of  Massachusetts
217 South Street
Waltham, MA 02453
Phone: 781-891-6270
Fax: 781-891-6271
Massachusetts Local Chapters

American Association on Intellectual and Developmental Disabilities (AAIDD)
promotes progressive policies, sound research, effective practices, and universal human rights for people with intellectual and developmental disabilities.

8403 Colesville Road, Suite 900

Silver Spring, MD 20910

Phone: 202-387-1968
Fax: 202-387-2193

President’s Committee for People with Intellectual Disabilities (PCPID)
The mission of PCPID is to provide advice and assistance to the President of the United States and the Secretary of Health and Human Services on a broad range of topics that impact people with intellectual disabilities and the field of intellectual disabilities.
Office of the Commissioner, U.S. Department of Health and Human Services
Washington, DC
Phone: (202) 795-7374
Fax: (202) 205-0402

The Association of Developmental Disabilities Providers (ADDP)
ADDP is comprised of more than 130 member organizations. These community-based providers come from every region of Massachusetts and support thousands of individuals and families.
1671 Worcester Road, Suite 201
Framingham, MA 01701
Phone: 508-405-8000
Fax: 508-405-8001
Contact form
Member listing

Massachusetts Department of Developmental Services (DDS)
The Department is dedicated to creating, in partnership with others, innovative and genuine opportunities for individuals with intellectual disabilities to participate fully and meaningfully in, and contribute to, their communities as valued members.
1000 Washington St.
Boston, MA 02118
Phone: 617-727-5608 (Voice) or 617-624-7783 (TTY) * ask the operator to give you the phone number for your local Area Office
Fax: 617-624-7577

DDS Family Support Centers 

Other Information:

Center for Parent Information and Resources Fact Sheet

Intellectual Disability – US National Library of Medicine

Fact Sheet last updated on: 8/30/2021

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