The 100 largest companies 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	United States Marine Corps marines.mil Provides rapid deployment of combined-arms task forces using naval mobility for power projection on land, sea, and air.	Armed Forces	🇺🇸 Washington	78,275	n/a
5	United States Department of War war.gov A government department providing military forces to defend the country, deter adversaries, and work with allies for national security	Armed Forces	🇺🇸 Washington	68,533	1949
6	Danaher Corporation danaher.com Global life sciences and diagnostics innovator accelerating science and technology to improve human health, partnering with customers to advance life-changing science.	Medical Equipment Manufacturing	🇺🇸 Washington	53,252	1984
7	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
8	Internal Revenue Service irs.gov This company's LinkedIn account provides IRS updates, tax guidance, job opportunities, and emphasizes privacy protection, emphasizing integrity, fairness, and law enforcement	Government Administration	🇺🇸 Washington	49,242	1862
9	The World Bank Group 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	43,096	n/a
10	Marine Corps Recruiting rmi.marines.com This organization focuses on recruiting individuals to become Marines, emphasizing leadership, values, and physical fitness, aiming to develop quality citizens	Armed Forces	🇺🇸 Washington	40,191	1775
11	U.S. Department of State state.gov The organization is dedicated to diplomacy, managing relationships with foreign governments, promoting America's interests, and representing citizens worldwide through diplomats and professionals	International Affairs	🇺🇸 Washington	37,601	n/a
12	U.S. Department of Homeland Security dhs.gov Protecting the nation through counterterrorism, border security, cybersecurity, emergency response, and partnerships to ensure safety and resilience.	Government Administration	🇺🇸 Washington	37,388	2003
13	American Red Cross redcross.org Mobilizing volunteers and donors to provide emergency relief, blood donations, and life-saving skills training for communities worldwide.	Non-profit Organizations	🇺🇸 Washington	33,900	n/a
14	Federal Aviation Administration faa.gov Leading innovation in commercial space transportation, satellite-based navigation systems, and safe integration of unmanned aerial systems to promote aerospace safety and advancements	Aviation and Aerospace Component Manufacturing	🇺🇸 Washington	33,144	1958
15	U.S. Coast Guard uscg.mil Protect public safety, environment, and economic interests along coasts, ports, waterways, and international waters supporting national security.	Armed Forces	🇺🇸 Washington	32,193	1790
16	US Army Corps of Engineers usace.army.mil Provides public engineering services to enhance national security, boost the economy, and mitigate disaster risks through innovative and sustainable solutions	Armed Forces	🇺🇸 Washington	26,566	1776
17	ibex ibex.co Provides global business process outsourcing, digital marketing, and customer engagement solutions using advanced technology and a large workforce.	Outsourcing and Offshoring Consulting	🇺🇸 Washington	25,670	n/a
18	U.S. Department of Justice justice.gov Enforce laws, defend national interests, ensure public safety, prevent crime, administer justice fairly, and provide federal leadership in legal matters.	Law Enforcement	🇺🇸 Washington	24,792	1789
19	USDA Forest Service fs.usda.gov Administers national forests and grasslands, with a focus on sustaining their health, diversity, and productivity for current and future generations	Government Administration	🇺🇸 Washington	23,342	1905
20	USDA usda.gov A federal executive department that develops and executes government policies on farming, agriculture, and food to support farmers, promote trade, ensure food safety, and protect resources	Government Administration	🇺🇸 Washington	23,229	n/a
21	FEMA fema.gov FEMA provides support to survivors and first responders during disasters, fostering innovation and rewarding performance in a high-performance workforce	Government Administration	🇺🇸 Washington	19,336	1979
22	Xylem xylem.com Global provider of advanced technologies and services focused on water and wastewater management, conservation, reuse, and environmental return.	Industrial Machinery Manufacturing	🇺🇸 Washington	19,290	n/a
23	US Government Accountability Office gao.gov Provide Congress with objective, fact-based information to improve federal government performance and ensure accountability for taxpayers' benefit.	Government Administration	🇺🇸 Washington	17,307	n/a
24	US Environmental Protection Agency (EPA)epa.gov It protects human health and the environment by ensuring clean air, land, and water while enforcing federal environmental laws effectively.	Government Administration	🇺🇸 Washington	16,471	1970
25	USAID usaid.gov This organization works to end global poverty and support resilient, democratic societies by promoting economic prosperity, democracy, health, education, and humanitarian assistance worldwide	International Affairs	🇺🇸 Washington	16,196	1961
26	National Park Service nps.gov The company preserves, protects, and shares over 420 natural, cultural, and recreational sites across America, including national parks and historic places	Government Administration	🇺🇸 Washington	14,798	1916
27	U.S. Department of the Treasury home.treasury.gov Promotes economic prosperity, manages financial systems, advises government, enforces sanctions, and collaborates internationally to ensure financial stability and security.	Government Administration	🇺🇸 Washington	14,485	1789
28	U.S. Department of Health and Human Services (HHS)hhs.gov Protecting health of Americans and providing essential human services, focusing on vulnerable populations and those least able to help themselves.	Government Administration	🇺🇸 Washington	14,182	n/a
29	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
30	International Brotherhood of Electrical Workers (IBEW)ibew.org A union representing over 775,000 members in various skilled occupations, negotiating collectively for wages, benefits, and rights in the US and Canada	Construction	🇺🇸 Washington	13,887	1891
31	GSA gsa.gov An independent agency of the US government providing real estate, acquisition, technology, and support services to federal agencies for effective and efficient government operations	Government Administration	🇺🇸 Washington	13,384	n/a
32	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
33	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
34	The George Washington University gwu.edu Independent university offering diverse undergraduate, graduate, and professional programs focused on research, teaching, and community engagement in Washington, D.C.	Higher Education	🇺🇸 Washington	11,606	1821
35	NOAA: National Oceanic & Atmospheric Administration noaa.gov NOAA provides daily weather forecasts, climate monitoring, fisheries management, and marine commerce support, using cutting-edge research and technology	Government Administration	🇺🇸 Washington	11,487	n/a
36	U.S. Department of Education ed.gov The company works to promote student achievement, foster educational excellence, ensure equal access to education, and collect data on schools	Government Administration	🇺🇸 Washington	11,240	1979
37	United States Courts uscourts.gov Federal courts safeguarding constitutional rights, resolving civil and criminal cases, supporting legal processes, and providing public defenders and probation services nationwide.	Administration of Justice	🇺🇸 Washington	11,188	n/a
38	Vox Media corp.voxmedia.com A leading media company building top editorial brands and technology, shaping the future of media with podcasts, TV productions, and digital properties	Online Audio and Video Media	🇺🇸 Washington	11,029	2011
39	AGS Health agshealth.com Revenue cycle management services and intelligent automation for hospitals and health systems, providing end-to-end financial performance support and patient financial experience management.	Hospitals and Health Care	🇺🇸 Washington	10,806	2011
40	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
41	FTI Consulting fticonsulting.com Global expert firm providing crisis management, transformation consulting, and strategic solutions to organizations facing complex business challenges worldwide.	Business Consulting and Services	🇺🇸 Washington	10,452	1982
42	HTTP httppolicy.org A CEO roundtable of national Latino civil rights organizations promoting technology and telecommunications access, adoption, and utilization for the Hispanic community in the US	Public Policy Offices	🇺🇸 Washington	10,441	1996
43	Federal Bureau of Investigation (FBI)fbijobs.gov The company is seeking exceptional individuals dedicated to protecting the nation, upholding the Constitution, and staying ahead of evolving threats through diverse, inclusive teamwork	Law Enforcement	🇺🇸 Washington	10,407	1908
44	Georgetown University georgetown.edu Major international research university with student-centered programs in Washington DC, Doha Qatar, and global locations, rooted in Jesuit tradition.	Higher Education	🇺🇸 Washington	10,180	1789
45	US Department of Agriculture (USDA) Agricultural Research Service (ARS)ars.usda.gov A leading agricultural research agency under USDA, conducting cutting-edge projects to improve farming practices and technologies for consumers worldwide	Research Services	🇺🇸 Washington	9,821	1953
46	U.S. Customs and Border Protection careers.cbp.gov Securing national borders, ensuring traveler safety, preventing harmful products entry, and protecting millions of Americans across the country.	Government Administration	🇺🇸 Washington	9,653	2003
47	National Geographic nationalgeographic.com A multimedia destination sharing stories in science, exploration, and adventure, dedicated to funding scientists, explorers, and conservationists for over 135 years	Book and Periodical Publishing	🇺🇸 Washington	9,247	n/a
48	U.S. Department of Labor dol.gov Promote worker welfare, improve working conditions, advance employment opportunities, and ensure work-related benefits and rights for U.S. workers.	Government Administration	🇺🇸 Washington	8,338	1913
49	Peace Corps peacecorps.gov An international service organization sending Americans abroad to work with communities in education, health, economic development, agriculture, environment, and youth development	International Affairs	🇺🇸 Washington	8,068	1961
50	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
51	International Monetary Fund imf.org The company promotes global economic health by ensuring monetary system stability, providing advice, financing, and training to countries worldwide	International Trade and Development	🇺🇸 Washington	7,845	1945
52	Howard University howard.edu A culturally diverse, research-intensive university providing exceptional education at undergraduate, graduate, and professional levels with a focus on Black students and global leadership	Higher Education	🇺🇸 Washington	7,777	1867
53	Naval Facilities Engineering Systems Command (NAVFAC)navfac.navy.mil A Navy command specializing in planning, building, and maintaining sustainable facilities, delivering base services, and managing expeditionary combat force systems	Construction	🇺🇸 Washington	7,748	1842
54	Hogan Lovells hoganlovells.com Global team of 2,600+ lawyers providing innovative legal solutions for major industries worldwide, with a focus on diversity, community impact, and business strategy alignment	Law Practice	🇺🇸 Washington	7,724	1899
55	Children's National Hospital childrensnational.org A leading children's hospital in Washington, DC, dedicated to transforming pediatric medicine, research, and innovation to provide expert care for all children	Hospitals and Health Care	🇺🇸 Washington	7,710	1870
56	District of Columbia Public Schools (DCPS)dcps.dc.gov Public school district in Washington, D.C. serving over 51,000 students with 4,000 educators across 117 schools focused on reform.	Primary and Secondary Education	🇺🇸 Washington	7,699	n/a
57	United States Attorneys' Offices justice.gov The company oversees 93 United States Attorneys who serve as principal litigators, appointed by the President, responsible for federal law enforcement in each jurisdiction	Law Enforcement	🇺🇸 Washington	7,574	1789
58	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
59	U.S. Department of Energy (DOE)energy.gov Federal agency focused on restoring America's energy dominance through innovation, policy, and management of national energy resources and technologies.	Government Administration	🇺🇸 Washington	7,127	n/a
60	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
61	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
62	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
63	AARP aarp.org A nonprofit organization disrupting stereotypes about aging, advocating for issues affecting people 50-plus, providing services and information for health, finance, and fulfillment	Non-profit Organizations	🇺🇸 Washington	6,616	1958
64	Bureau of Land Management blm.gov Management of 245 million acres of public lands focused on sustaining health, productivity, and enjoyment for present and future generations.	Government Administration	🇺🇸 Washington	6,567	1946
65	U.S. Department of Housing and Urban Development hud.gov The company works to create inclusive communities, provide affordable housing, strengthen the economy, and improve quality of life through sustainable practices	Government Administration	🇺🇸 Washington	6,425	1965
66	Jones Day jonesday.com Provides comprehensive legal services worldwide through a large network of lawyers collaborating across multiple disciplines and jurisdictions.	Law Practice	🇺🇸 Washington	6,417	1893
67	DC Government dc.gov The company operates as the government of the District of Columbia, overseeing executive, legislative, and judicial branches to provide city services	Government Administration	🇺🇸 Washington	6,335	n/a
68	U.S. Department of Energy (DOE)energy.gov Address energy, environmental, and nuclear challenges through science, technology innovation, nuclear stockpile maintenance, and effective management for national security.	Government Administration	🇺🇸 Washington	6,238	n/a
69	US Government bradyplus.com A group of US government intelligence agencies and organizations working collectively to conduct intelligence activities supporting national security and foreign policy interests	Space Research and Technology	🇺🇸 Washington	6,188	n/a
70	American University american.edu A global education leader in the heart of the US capital, emphasizing social responsibility, diversity, and public service with prestigious faculty	Higher Education	🇺🇸 Washington	6,149	1893
71	FINRA finra.org Regulatory organization focusing on investor protection and market integrity by enforcing rules for over 3,300 financial firms and 610,000 brokers	Financial Services	🇺🇸 Washington	6,112	2007
72	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
73	United States Senate senate.gov Legislative chamber of the United States bicameral legislature with exclusive powers including confirming appointments and treaties, located in Washington DC	Legislative Offices	🇺🇸 Washington	5,880	1789
74	U.S. Office of Personnel Management (OPM)opm.gov The company provides human resources management services for the Federal Government, overseeing policies, benefits, hiring, and employee management programs for a secure workforce	Government Administration	🇺🇸 Washington	5,520	1979
75	U.S. Department of Transportation transportation.gov Leadership in transportation safety, infrastructure innovation, economic growth, and connecting Americans to opportunities through diverse transportation programs and public service.	Government Administration	🇺🇸 Washington	5,480	1967
76	United States Department of the Air Force af.mil A military department of the US Department of Defense that oversees the organization of the United States Air Force and United States Space Force	Armed Forces	🇺🇸 Washington	5,392	1947
77	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
78	CAVA cava.com Focus on delivering food with heart, health, and humanity, emphasizing quality and care in every meal served.	Restaurants	🇺🇸 Washington	5,240	2010
79	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
80	Microsoft Service Provider Specializing in Search Engine Optimization (SEO) services, we help businesses improve organic search rankings through keyword research, content creation, and technical audits	IT Services and IT Consulting	🇺🇸 Washington	4,989	2017
81	VA Healthcare Administration va.gov The organization is the largest integrated healthcare system in America, providing medical care to 9 million enrolled veterans through various health care facilities	Hospitals and Health Care	🇺🇸 Washington	4,778	n/a
82	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
83	U.S. Securities and Exchange Commission sec.gov Enforces federal securities laws, regulates national stock exchanges, protects investors, maintains orderly markets, and facilitates capital formation through five specialized divisional offices.	Financial Services	🇺🇸 Washington	4,554	n/a
84	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
85	United States Federal Government usa.gov This company serves as the national government of the United States, overseeing legislative, executive, and judicial branches as outlined in the US Constitution	Government Administration	🇺🇸 Washington	4,289	n/a
86	MedStar Georgetown University Hospital medstarhealth.org A leading not-for-profit hospital in DC offering innovative medical treatments, research, and compassionate care in various specialties like neurosciences and cancer	Hospitals and Health Care	🇺🇸 Washington	4,215	1898
87	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
88	American Psychological Association apa.org A leading organization representing psychology professionals in the US, advocating for the advancement of psychological knowledge to improve society	Non-profit Organizations	🇺🇸 Washington	4,073	1892
89	MedStar Washington Hospital Center medstarhealth.org A prominent not-for-profit teaching and research hospital in the nation's capital, specializing in cardiology, cardiac surgery, stroke care, trauma, and burn treatment	Hospitals and Health Care	🇺🇸 Washington	4,010	1958
90	Chemonics International chemonics.com An international development company with 4,000 specialists globally, focusing on various sectors like agriculture, governance, health, and supply chain solutions	Professional Services	🇺🇸 Washington	3,985	1975
91	DoW Civilian Careers dodciviliancareers.com An organization empowering individuals to find their purpose and explore careers related to the Department of Defense #DoDForward	Government Administration	🇺🇸 Washington	3,979	n/a
92	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
93	Job Corps jobcorps.gov Free education and training program for youth, offering career skills, high school diploma or GED, and job placement support.	Education Administration Programs	🇺🇸 Washington	3,906	1964
94	Consilio LLC consilio.com Offers eDiscovery, document review, flexible legal talent, legal advisory, and transformation consulting services to law firms and corporations globally.	Law Practice	🇺🇸 Washington	3,639	n/a
95	Bureau of Reclamation usbr.gov A key player in water resource management, providing irrigation water to farmers and delivering water to over 31 million people in the western states	Government Administration	🇺🇸 Washington	3,623	1902
96	U.S. Department of Commerce commerce.gov Promotes economic growth, strengthens domestic industry, supports job creation, and represents business interests across all U.S. communities.	Government Administration	🇺🇸 Washington	3,580	1903
97	The Washington Post washingtonpost.com A leading news organization focused on trustworthy reporting, in-depth analysis, and engaging opinions through a blend of journalism and technology	Newspaper Publishing	🇺🇸 Washington	3,473	1877
98	Defense Intelligence Agency dia.mil Provides all-source defense intelligence to support warfighters, defense planners, and policymakers in protecting national security interests worldwide.	Armed Forces	🇺🇸 Washington	3,416	1961
99	Special Olympics specialolympics.org Organisation dedicated to providing year-round sports training and competition for individuals with intellectual disabilities, promoting physical fitness, courage, joy, and community inclusion	Non-profit Organizations	🇺🇸 Washington	3,390	n/a
100	U.S. Naval Research Laboratory nrl.navy.mil Conducts scientific research with applications for the Department of the Navy, the Defense Department and the nation, driving innovative advances for the U.S. Navy and Marine Corps.	Research Services	🇺🇸 Washington	3,372	1923

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

How this list is built

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 9, 2026.

The 100 largest companies in Washington

Turn this list into pipeline

How this list is built

More company lists in Washington

The same list elsewhere in United States