The 51 largest public sector organisations in Washington (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	U.S. Department of Veterans Affairs va.gov Recruitment of skilled employees dedicated to providing respectful and appropriate care and support services for United States veterans.	Government Administration	🇺🇸 Washington	202,010	1930
2	United States Postal Service usps.com Delivers mail and packages to over 157 million addresses nationwide, connecting every American, every door, every business, everywhere, funded by sales, not tax dollars.	Government Administration	🇺🇸 Washington	159,003	n/a
3	US Navy navy.mil This company is responsible for protecting America at sea, defending freedom, preserving prosperity, and keeping the seas open and free	Armed Forces	🇺🇸 Washington	150,748	n/a
4	NASA - National Aeronautics and Space Administration nasa.gov A pioneering organization pushing the boundaries of space exploration, scientific discovery, and aeronautics research to benefit humanity and improve life on Earth	Aviation and Aerospace Component Manufacturing	🇺🇸 Washington	50,817	1958
5	The World Bank worldbank.org A global institution providing financial and technical assistance to developing countries to reduce poverty and promote sustainable development across various sectors	International Trade and Development	🇺🇸 Washington	44,863	1944
6	Amtrak amtrak.com A transportation company with 21,000 route miles across North America, operating high-speed trains to over 500 destinations while prioritizing customer needs and safety	Rail Transportation	🇺🇸 Washington	13,914	1971
7	Fannie Mae fanniemae.com Provides affordable mortgage credit and financing solutions to support homebuyers and renters, promoting stability and accessibility in housing markets.	Financial Services	🇺🇸 Washington	12,201	1938
8	U.S. Census Bureau census.gov Leading provider of quality data about population and economy, ensuring privacy, confidentiality, innovation, and customer commitment.	Government Administration	🇺🇸 Washington	11,924	1902
9	IFC - International Finance Corporation ifc.org An international organization supporting private sector development in developing countries by providing financial resources, expertise, and forging partnerships for sustainable growth	Financial Services	🇺🇸 Washington	10,688	n/a
10	Inter-American Development Bank iadb.org Long-term financing, research, policy advice, and technical assistance for economic and social development in Latin America and the Caribbean.	International Trade and Development	🇺🇸 Washington	8,048	1959
11	U.S. Small Business Administration sba.gov Established in 1953, this organization assists small business owners with counseling, capital, and contracting expertise to start, grow, expand, or recover confidently	Government Administration	🇺🇸 Washington	7,471	1953
12	Washington Metropolitan Area Transit Authority (WMATA)wmata.com A regional transit company in the DC area, offering rail, bus, and paratransit services, seeking innovators to tackle system challenges	Urban Transit Services	🇺🇸 Washington	6,711	1967
13	Federal Deposit Insurance Corporation (FDIC)fdic.gov Protecting deposits by insuring up to $250,000 in banks and thrift institutions, monitoring risks, and minimizing economic impact of failures since 1933	Banking	🇺🇸 Washington	6,690	1933
14	Smithsonian Institution si.edu The world's largest museum, education, and research complex fostering a community of learning and discovery for all Legal: [link]	Museums, Historical Sites, and Zoos	🇺🇸 Washington	6,665	n/a
15	United States Space Force spaceforce.mil Organizes, trains, and equips space forces to protect national interests, acquires military space systems, and develops professional doctrine for specialized combatant commands.	Defense and Space Manufacturing	🇺🇸 Washington	6,087	2019
16	Veterans Administation A Hospital and Health Care organization providing services in Sepulveda, California to support veterans in the United States	Hospitals and Health Care	🇺🇸 Washington	5,253	n/a
17	U.S. Department of the Interior careers.doi.gov Managing natural resources, honoring tribal cultures, overseeing energy production, and conserving wildlife across diverse U.S. lands and waters.	Government Administration	🇺🇸 Washington	5,111	1849
18	USCIS uscis.gov The company ensures fairness, integrity, and respect for all individuals served, embodying America's promise as a nation of welcome and possibility	Government Administration	🇺🇸 Washington	4,756	2003
19	Library of Congress loc.gov Preservation and provision of extensive collections to support congressional research and promote knowledge and creativity for Americans.	Libraries	🇺🇸 Washington	4,544	1800
20	USEPA epa.gov The company addresses environmental issues in the United States and abroad through regulation, enforcement, research, setting standards, and international coordination	Environmental Services	🇺🇸 Washington	4,180	1970
21	Federal Bureau of Prisons - Career Connections careers.bop.gov A government agency focused on protecting society, rehabilitating inmates, and offering diverse career opportunities within federal prisons across the United States	Law Enforcement	🇺🇸 Washington	3,966	1930
22	USDA Farm Service Agency fsa.usda.gov Agricultural accounting company in East Lansing, MI specializing in USDA services and support for farmers	Government Administration	🇺🇸 Washington	2,866	1933
23	Federal Reserve System selectminds.com The company is the central bank of the United States, promoting a stable economy through monetary policy, bank supervision, and financial services	Banking	🇺🇸 Washington	2,249	n/a
24	Federal Communications Commission fcc.gov Independent U.S. government agency regulating interstate and international communications via radio, television, wire, satellite, and cable services.	Telecommunications	🇺🇸 Washington	2,207	1934
25	University of the District of Columbia udc.edu A diverse urban land-grant institution in the United States offering education, research, and community service through various colleges and schools	Higher Education	🇺🇸 Washington	2,061	1851
26	USAJOBS usajobs.gov The company maintains social media accounts to communicate with the public, providing information and guidelines to ensure respectful interaction	Human Resources Services	🇺🇸 Washington	2,010	1996
27	U.S. Courts of Appeals uscourts.gov Supporting US courts of appeals with legal professionals overseeing intermediate appellate cases, ensuring justice under the law nationwide	Administration of Justice	🇺🇸 Washington	1,892	n/a
28	Veterans Affairs Hospital va.gov An international company based in Washington, DC that specializes in veterans affairs and healthcare services	International Affairs	🇺🇸 Washington	1,699	n/a
29	Pan American Health Organization paho.org An international public health agency founded in 1902, providing technical cooperation to improve health and quality of life in the Americas	International Affairs	🇺🇸 Washington	1,680	1902
30	Cybersecurity and Infrastructure Security Agency cisa.gov National coordinator for critical infrastructure security and resilience, and America's cyber defense agency. They secure national cyber and infrastructure.	Government Administration	🇺🇸 Washington	1,664	2018
31	United States Senate SAA senate.gov The company is the upper house of the bicameral legislature in the United States with exclusive powers and a reputation for deliberation and prestige	Legislative Office	🇺🇸 Washington	1,538	n/a
32	National Gallery of Art nga.gov A world-renowned art museum offering masterpieces, temporary exhibitions, and public programs for all to explore and experience art and culture	Museums	🇺🇸 Washington	1,419	1941
33	U.S. Postal Inspection Service uspis.gov Enforcement of federal laws related to mail crimes, investigation, forensic analysis, security of postal facilities, and protection of mail shipments.	Law Enforcement	🇺🇸 Washington	1,403	1775
34	AmeriCorps VISTA americorps.gov A national service program focused on eliminating poverty by empowering communities through initiatives and capacity-building efforts	Civic and Social Organizations	🇺🇸 Washington	1,161	n/a
35	Metropolitan Washington Airports Authority mwaa.com Management and operation of two major airports providing domestic and international air service with dedicated administration, security, and emergency services.	Airlines and Aviation	🇺🇸 Washington	1,157	1987
36	Public Company Accounting Oversight Board (PCAOB)pcaobus.org A nonprofit overseen by Congress managing audits of public companies and brokers, ensuring quality and compliance with federal securities laws	Financial Services	🇺🇸 Washington	1,099	2003
37	Pension Benefit Guaranty Corporation (PBGC)pbgc.gov Since 1974, we have been protecting retirement security for over 33 million American workers, retirees, and families in private-sector pension plans	Government Administration	🇺🇸 Washington	1,074	1974
38	DC Water dcwater.com Providing innovative solutions and leadership to address environmental challenges in the nation's capital through skilled and dedicated employees.	Utilities	🇺🇸 Washington	1,055	n/a
39	Walter Reed Army Medical Center en.wikipedia.org A medical center specializing in serving the needs of US Army personnel while providing advanced healthcare services	Hospitals and Health Care	🇺🇸 Washington	971	1947
40	Bureau of Engraving and Printing bep.gov The company prints Federal Reserve Notes and other security documents for government agencies, including US passports and military identification cards	Printing Services	🇺🇸 Washington	939	1862
41	U.S. International Development Finance Corporation dfc.gov A government institution partnering with the private sector to finance projects addressing critical challenges in emerging markets, focusing on job creation and sustainability	International Trade and Development	🇺🇸 Washington	917	2019
42	U. S. Courts Probation and Pretrial Services uscourts.gov Federal probation and pretrial services officers assist the courts in investigating, supervising, and providing services to individuals charged with federal crimes	Administration of Justice	🇺🇸 Washington	877	n/a
43	IDB Invest idbinvest.org Multilateral bank providing financial solutions and advisory services to sustainable private sector companies for economic, social, and environmental growth in Caribbean countries.	Financial Services	🇺🇸 Washington	867	n/a
44	Administrative Office of the United States Courts uscourts.gov The Administrative Office of the US Courts provides support services to federal courts, implements policies, and ensures equal justice under the law	Administration of Justice	🇺🇸 Washington	837	1939
45	Export-Import Bank of the United States exim.gov An official export credit agency of the United States that provides financing to support exports and create US export-related jobs	Banking	🇺🇸 Washington	709	1934
46	United States Mint usmint.gov A national institution manufacturing circulating, precious metal, and collectible coins, along with national medals, while ensuring security over entrusted assets	Government Administration	🇺🇸 Washington	667	1792
47	MIGA miga.org Provides political risk insurance, credit enhancement, and trade finance guarantees to attract private capital to developing countries.	International Trade and Development	🇺🇸 Washington	638	n/a
48	National Energy Technology Laboratory netl.doe.gov Driving innovative solutions for a sustainable energy future, focusing on research, partnerships, and technologies to ensure affordable, reliable energy and environmental sustainability for all Americans	Research Services	🇺🇸 Washington	479	1910
49	United States Agency for Global Media usagm.gov The company encompasses US international broadcasting entities, reaching 420 million people weekly in 63 languages through radio, TV, and internet	Broadcast Media Production and Distribution	🇺🇸 Washington	429	n/a
50	Center City Public Charter Schools centercitypcs.org Center City Public Charter Schools in Washington DC empowers students through character-building, academic excellence, and community service in PreK-8 education	Education Administration Programs	🇺🇸 Washington	252	2008
51	Inter-American Investment Corporation (IIC)idbinvest.org IDB Invest, formerly known as the Inter-American Investment Corporation, provides investment opportunities and financial services in the Americas Visit their website for more information	Financial Services	🇺🇸 Washington	147	n/a

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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 51 largest public sector organisations in Washington

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