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Community & Nonprofit

Social Services & Nonprofits in Nassau County, NY

363 nonprofit organizations listed · Updated Oct 27, 2026

Find nonprofits and social service organizations in Nassau County for help, volunteering and giving.

Avahere lists 363 nonprofit organizations across 56 Nassau County towns. Of these, 65 show a public phone number, 184 link to a website and 63 list a street address. The most listings are in Hempstead (28), Great Neck (18), Glen Cove (16). None of these businesses has claimed its page yet, so the details come from public business records.

363 results

Results

  4. 284. KPC

    Unclaimed
    No reviews yet

    Social Service OrganizationSyosset

    Serves Syosset and nearby

    View details

Towns with social services & nonprofits

56 Nassau County towns, A–Z. Pick yours to see local listings.

Social Services & Nonprofits in Nassau County: common questions

How many nonprofit organizations are in Nassau County, NY?
Avahere lists 363 nonprofit organizations across 56 towns in Nassau County.
How do I contact a nonprofit organization listed here?
Open the business page to see what the business has shared, such as its website, phone and location. Claimed businesses keep their own details up to date.
I run a nonprofit organization business. How do I update my listing?
Find your business and choose "Claim it free". After a quick check you can edit your details, add services and photos, and answer customers at no cost.
Is Avahere free?
Yes. Avahere is free for customers and for businesses. There are no lead fees, and businesses cannot pay to rank higher.

Listings come from public business records and from business owners. Avahere does not show owner names or private contact details. Spot a mistake or want a listing removed? Remove a listing or contact us.