The 31 largest Non-profit Organizations companies in Arlington (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	The Nature Conservancy nature.org Protecting and conserving natural resources through science-based, community-driven efforts to ensure a sustainable future for all life.	Non-profit Organizations	🇺🇸 Arlington	7,441	1951
2	NAMI nami.org Leading grassroots mental health organization advocating for access to services, treatment, and research, while supporting and raising awareness for those affected by mental illness	Non-profit Organizations	🇺🇸 Arlington	3,007	1979
3	TechnoServe technoserve.org A nonprofit organization empowering people in the developing world to build competitive farms, businesses, and industries to alleviate poverty	Non-profit Organizations	🇺🇸 Arlington	2,599	1968
4	Conservation International conservation.org Protecting critical natural areas globally through science, policy, finance, and partnerships to secure benefits nature provides to humanity.	Non-profit Organizations	🇺🇸 Arlington	1,756	1987
5	March of Dimes marchofdimes.org Advocating policies, improving healthcare, pioneering research, and empowering families to ensure healthier pregnancies and better outcomes for moms and babies.	Non-profit Organizations	🇺🇸 Arlington	1,590	1938
6	International Justice Mission ijm.org Human rights agency fighting against slavery, sexual exploitation, and oppression worldwide Working with governments to rescue victims, prosecute perpetrators, and strengthen justice systems	Non-profit Organizations	🇺🇸 Arlington	1,344	1997
7	USO uso.org Providing support and entertainment to US military members and their families through a network of centers and programs, with the help of volunteers and donations	Non-profit Organizations	🇺🇸 Arlington	1,275	1941
8	American Diabetes Association diabetes.org A company dedicated to uplifting people with diabetes, providing affordable care, funding research, and working towards ending diabetes through advocacy	Non-profit Organizations	🇺🇸 Arlington	1,182	n/a
9	NRECA electric.coop Promotes, supports, and protects interests of electric cooperatives; advocates for safe, reliable, affordable electric service; researches new energy technologies; promotes global rural electrification.	Non-profit Organizations	🇺🇸 Arlington	1,085	1942
10	Meals on Wheels America mealsonwheelsamerica.org National organization supporting community-based senior nutrition programs, addressing senior isolation and hunger through nutritious meals, friendly visits, and safety checks	Non-profit Organizations	🇺🇸 Arlington	1,032	n/a
11	Stand Together standtogether.org A philanthropic community supporting diverse changemakers to tackle root causes of societal issues by providing funding, network, and growth strategies	Non-profit Organizations	🇺🇸 Arlington	820	n/a
12	Biomedical Engineering Society linktr.ee A global professional society founded in 1968, dedicated to advancing human health through innovative biomedical and bioengineering technology #BMES2021	Non-profit Organizations	🇺🇸 Arlington	717	1968
13	Blumont, Inc.blumont.org A global organization empowering communities worldwide to overcome challenges, create progress, and envision a future based on aspirations of individuals	Non-profit Organizations	🇺🇸 Arlington	684	1998
14	Communities In Schools National Office communitiesinschools.org Bringing community resources into schools to support students in achieving academic, behavioral, and attendance goals for long-term success #AllinforKids	Non-profit Organizations	🇺🇸 Arlington	678	1977
15	Associated General Contractors of America agc.org An association representing over 27,000 construction firms, advocating for the industry, providing education on construction techniques, and facilitating networking opportunities	Non-profit Organizations	🇺🇸 Arlington	625	1918
16	U.S. Committee for Refugees and Immigrants (USCRI)refugees.org This organization provides critical support and services to refugees, immigrants, and survivors of human trafficking to help them integrate and thrive in their communities	Non-profit Organizations	🇺🇸 Arlington	618	1911
17	Seed Company seedcompany.com Accelerating Bible translation and impact for global communities through partnerships, emphasizing transformational impact and quality results in every language	Non-profit Organizations	🇺🇸 Arlington	604	1993
18	Navy-Marine Corps Relief Society nmcrs.org A nonprofit organization providing financial and educational assistance to active and retired members of the Navy and Marine Corps, as well as their families in need	Non-profit Organizations	🇺🇸 Arlington	595	1904
19	Air & Space Forces Association afa.org An independent nonprofit organization promoting US Air and Space Forces through education, advocacy, support, and various aerospace education programs and initiatives	Non-profit Organizations	🇺🇸 Arlington	519	1946
20	Trout Unlimited tu.org Dedicated to conserving and restoring North America's coldwater fisheries and watersheds, bringing together diverse interests to care for rivers and streams	Non-profit Organizations	🇺🇸 Arlington	503	1959
21	Navy League of the United States navyleague.org Civilian organization supporting sea service members and families, advocating for a strong maritime presence, and educating the public and youth on the importance of sea power.	Non-profit Organizations	🇺🇸 Arlington	501	1902
22	Rare rare.org Global leader in driving social change for people and nature through inspiring and empowering communities to protect the planet through collective action	Non-profit Organizations	🇺🇸 Arlington	499	n/a
23	NACD (National Association of Corporate Directors)nacdonline.org Empowering over 23,000 directors to lead confidently in the boardroom, providing educational courses, research, briefings, and advisory services in navigating business complexities	Non-profit Organizations	🇺🇸 Arlington	496	1977
24	The ALS Association als.org A non-profit organization founded in 1985 that leads global research, provides assistance, coordinates care, and works towards finding treatments and a cure for ALS	Non-profit Organizations	🇺🇸 Arlington	479	1985
25	APIC apic.org Leading professional association for infection preventionists with a mission to create a safer world through infection prevention, care improvement, and cost reduction	Non-profit Organizations	🇺🇸 Arlington	422	n/a
26	Agricultural Retailers Association aradc.org Advocates, influences, educates, and provides services to support sellers of agricultural products and services Represents industry's voice to government	Non-profit Organizations	🇺🇸 Arlington	404	n/a
27	National Council on Aging ncoa.org This company has been advocating for older adults since 1950, providing resources, digital tools, and advocacy for aging with health and financial security	Non-profit Organizations	🇺🇸 Arlington	312	1950
28	Independent Electrical Contractors, Inc. - IEC ieci.org National trade association for merit shop electrical contractors, promoting quality services, competitive pricing, and skilled manpower to foster a stronger economy	Non-profit Organizations	🇺🇸 Arlington	309	1957
29	Helping Restore Ability hratexas.org A 501c3 organization offering independence, freedom, and dignity to low-income individuals and families living with disabling conditions in Texas	Non-profit Organizations	🇺🇸 Arlington	160	1977
30	Infectious Diseases Society of America idsociety.org A professional organization representing physicians and scientists specialized in infectious diseases, promoting excellence in patient care, education, research, public health, and prevention	Non-profit Organizations	🇺🇸 Arlington	156	1963
31	Live Action liveaction.org A non-profit organization dedicated to ending abortion, promoting the right to life, and exposing the reality of the abortion industry through education and media campaigns	Non-profit Organizations	🇺🇸 Arlington	152	2008

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.

The 31 largest Non-profit Organizations companies in Arlington

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