Company lists · Data refreshed November 2026

Top 25 Down syndrome organizations based in the United States

RevenueBase identified 729 company matches for down syndrome organizations associated with the United States as of November 2026 and tracks 18,058 professional contacts across them, including 5,195 with verified work emails. New York is the largest hub.

This list covers company matches for down syndrome organizations associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
729Companies
18,058Contacts tracked
5,195Verified emails
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The 25 largest down syndrome organizations based in the United States

Ranked by team size
Top 25 of 729 company matches for down syndrome organizations based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHarrisburg, PA, United StatesHQ recorded Nov 6, 20261,001-5,000998 contacts →

Exact match

“Keystone Human Services is a nonprofit organization dedicated to advancing the human spirit of all people.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Nov 6, 2026n/a986 contacts →

Exact match

“The Arc is the largest national community-based organization advocating for and serving people with intellectual and developmental disabilities and their families.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMiami, FL, United StatesHQ recorded Nov 6, 2026201-500838 contacts →

Exact match

“Best Buddies International is a nonprofit 501(c)(3) organization dedicated to establishing a global volunteer movement that creates opportunities for one-to-one friendships…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchWatertown, WI, United StatesHQ recorded Nov 6, 20261,001-5,000834 contacts →

Exact match

“In January 2022, Bethesda Lutheran Communities changed our name to AbleLight.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLancaster, PA, United StatesHQ recorded Nov 6, 20261,001-5,000411 contacts →

Exact match

“OneWell Health Care is the largest national community-based organization dedicated to advocating for and supporting individuals with intellectual and developmental disabilities…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchWoodland Hills, CA, United StatesHQ recorded Nov 6, 2026501-1,000288 contacts →

Exact match

“Founded more than 70 years ago, Momentum has become the largest nonprofit provider of direct-care services in Southern California for individuals with cerebral palsy, autism, Down…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchHoffman Estates, IL, United StatesHQ recorded Nov 6, 2026n/a263 contacts →

Exact match

“GiGi’s Playhouse is the ONLY nationwide network of Down syndrome achievement centers; changing lives through free, results-driven programs for individuals of all ages, families…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchPlainview, NY, United StatesHQ recorded Nov 6, 20261,001-5,000252 contacts →

Exact match

“For six decades, ACDS has been a trusted resource for individuals with Down syndrome, autism, and other developmental disabilities, and families who love them.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchWalnut Creek, CA, United StatesHQ recorded Nov 6, 2026501-1,000250 contacts →

Exact match

“Catalight breaks down barriers and biases to create a more equitable world so people with developmental disabilities can choose their path.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCorona, CA, United StatesHQ recorded Nov 6, 20261,001-5,000246 contacts →

Exact match

“A company dedicated to serving the needs of people with developmental disabilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchWestminster, CO, United StatesHQ recorded Nov 6, 20261,001-5,000227 contacts →

Exact match

“arc Thrift Stores is a nonprofit organization whose mission is to support programs that benefit individuals living with developmental disabilities and their families.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMuskegon, MI, United StatesHQ recorded Nov 6, 2026201-500225 contacts →

Exact match

“Creating opportunities for independence and acceptance in our communities by supporting people with intellectual and developmental disabilities in making choices, building…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchRaleigh, NC, United StatesHQ recorded Nov 6, 2026501-1,000212 contacts →

Exact match

“The Arc of North Carolina is committed to securing for all people with intellectual and developmental disabilities the opportunity to choose and realize their goals of where and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchNashua, NH, United StatesHQ recorded Nov 6, 2026501-1,000199 contacts →

Exact match

“Gateways Community Services is a private non-profit corporation created in 1981 to establish and maintain programs and services which promote growth and independence for…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-200195 contacts →

Exact match

“Understood is a nonprofit focused on shaping the world for difference.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSpring Valley, NY, United StatesHQ recorded Nov 6, 20261,001-5,000191 contacts →

Exact match

“Yedei Chesed was founded to support and assist individuals with developmental and intellectual disabilities and their families with personalized service in their unique situations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSpringfield, MA, United StatesHQ recorded Nov 6, 2026501-1,000190 contacts →

Exact match

“Founded in 1952 by five mothers of young children with developmental disabilities, Pathlight was the first organization in Hampden County dedicated to serving individuals with…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchDover, NH, United StatesHQ recorded Nov 6, 2026501-1,000184 contacts →

Exact match

“For 23 years Living Innovations has partnered with thousands of families in New Hampshire, Maine, and Rhode Island to support people with intellectual and developmental…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSilver Spring, MD, United StatesHQ recorded Nov 6, 2026201-500180 contacts →

Exact match

“National Children's Center, Inc.(NCC) is a recognized leader in providing comprehensive and innovative services for children and adults with developmental disabilities in the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchDorchester, United StatesHQ recorded Nov 6, 2026501-1,000169 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchEwing, NJ, United StatesHQ recorded Nov 6, 2026201-500161 contacts →

Exact match

“The Arc Mercer is a nonprofit organization providing support services to children and adults with developmental disabilities in the greater Mercer County community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchHagerstown, MD, United StatesHQ recorded Nov 6, 2026501-1,000157 contacts →

Exact match

“Founded in 1952, The Arc of Washington County promotes community involvement, independence and dignity for children and adults with intellectual and developmental disabilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchTinton Falls, NJ, United StatesHQ recorded Nov 6, 2026201-500153 contacts →

Exact match

“Many families of individuals with intellectual and developmental disabilities (I/DD) can feel alone, lacking the necessary resources to help their loved ones enjoy fulfilling…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchChatham, NJ, United StatesHQ recorded Nov 6, 2026201-500149 contacts →

Exact match

“Established in 1970, ECLC is an accredited, nonprofit offering "Education, Careers & Lifelong Community” to children and adults with special needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchSouth Bend, IN, United StatesHQ recorded Nov 6, 2026201-500138 contacts →

Exact match

“LOGAN is a community organization which provides advocacy, services and resources for children and adults with developmental and intellectual disabilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 729 down syndrome organizations based in the United States

See the full list, filter by size, metro and specialty, and access 5,195 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Down syndrome organizations based in the United States at a glance

As of Nov 6, 2026
28.8%Verified-email coverage
24.8Average contacts per company
1-10Median size (employees)
1.2%Largest-city concentration · New York
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
392
11-50
145
51-200
97
201-500
49
501-1,000
29
1,001-5,000
10

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 729 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “down syndrome organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 5,195 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “down syndrome organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many down syndrome organizations are there based in the United States?

RevenueBase identified 729 company matches for down syndrome organizations associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Keystone Human Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most down syndrome organizations?

New York leads with 9 company records, followed by Columbus (8) and Chicago (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 5,195 professional contacts with verified work emails tracked across these 729 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.