A-Z index of U.S. government departments and agencies
Find contact information for U.S. federal government departments and agencies including websites, emails, phone numbers, addresses, and more.
A
The AbilityOne Commission creates job opportunities for people who are blind or have other significant disabilities in the manufacture and delivery of products and services to the Federal Government.
Website:
Phone number:
1-703-603-2100
The Access Board is an independent federal agency devoted to accessibility for people with disabilities. The Board develops and maintains design criteria for the built environment, transit vehicles, telecommunications equipment, and for electronic and information technology.
Website:
Phone number:
1-202-272-0080
Contact:
The Administration for Children and Families (ACF) funds state, territory, local, and tribal organizations to provide family assistance (welfare), child support, child care, Head Start, child welfare, and other programs relating to children and families.
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The Administration for Community Living (ACL) supports the needs of the aging and disability populations, and improves access health care and long-term services.
Website:
Phone number:
1-202-401-4634
The Administration for Native Americans (ANA) promotes self-sufficiency and cultural preservation for Native Americans by providing social and economic development opportunities through financial assistance, training, and technical assistance.
Website:
The Administrative Conference of the United States (ACUS) is an independent federal agency dedicated to improving federal agency administrative processes and procedures.
Phone number:
1-202-480-2080
The Administrative Office of the United States Courts handles the nonjudicial, administrative business of the United States Courts such as maintaining statistics and managing Court budgets.
Phone number:
1-202-502-2600
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The Advisory Council on Historic Preservation (ACHP) encourages the preservation of historic properties across the nation.
Phone number:
1-202-517-0200
The U.S. Africa Command strengthens the defense capabilities of African nations.
Website:
Phone number:
1-314-430-1110
Contact:
The African Development Foundation (USADF) provides grants to community groups and small enterprises that benefit under-served and marginalized groups in Africa.
Website:
The U.S. Agency for Global Media, formerly known as the Broadcasting Board of Governors, broadcasts news and information about the United States and the world to audiences abroad.
Website:
Phone number:
1-202-203-4000
The Agency for Healthcare Research and Quality (AHRQ) supports research to improve the quality, safety, efficiency, and effectiveness of health care for all Americans.
Phone number:
1-301-427-1104
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The U.S. Agency for International Development (USAID) is the principal U.S. agency to extend assistance to countries recovering from disaster, trying to escape poverty, and engaging in democratic reforms.
Phone number:
1-202-712-4810
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The Agency for Toxic Substances and Disease Registry (ATSDR) responds to, and protects people from harmful chemical exposures.
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The Agricultural Marketing Service (AMS) supports the fair marketing of U.S. agricultural products.
Website:
Phone number:
1-202-720-8998
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The Agricultural Research Service (ARS) works to find solutions to agricultural problems.
Website:
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The Department of Agriculture provides leadership on food, agriculture, natural resources, and related issues.
Phone number:
1-202-720-2791
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The National Agricultural Library is the main source of information and research on agriculture.
Website:
Phone number:
1-301-504-5755
The Air Force defends the United States in the air and space.
Website:
Contact:
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The Air Force Reserve Command performs missions and supports Air Force operations.
Website:
Phone number:
1-478-327-1753
The Alcohol and Tobacco Tax and Trade Bureau (TTB) collects taxes and enforces regulations on alcohol, tobacco, firearms, and ammunition.
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The Bureau of Alcohol, Tobacco, Firearms and Explosives enforces federal criminal laws regulating the firearms and explosives industries.
Phone number:
1-202-648-7777 (for criminal intelligence/law enforcement matters only)
The Middle East Broadcasting Network operates Alhurra TV and Radio Sawa. Alhurra TV and Radio Sawa provide news to the people of the Middle East about the region, the world, and the United States.
Website:
Phone number:
1-703-852-9000
The American Battle Monuments Commission (ABMC) manages 24 military cemeteries abroad, and 25 memorials, monuments, and markers. Nearly all the cemeteries and memorials honor those who served in World War I or World War II.
Website:
Phone number:
1-703-584-1501
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Formerly known as the Corporation for National and Community Service, AmeriCorps, and AmeriCorps Seniors engage volunteers in serving directly with nonprofit organizations to tackle the nation's most pressing challenges.
Website:
Contact:
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AmeriCorps Seniors is a network of volunteer programs for Americans 55 years and older. Volunteers work in their community doing academic tutoring and mentoring, elderly care, disaster relief, and more.
Website:
Contact:
Amtrak, the National Railroad Passenger Corporation, provides intercity rail passenger service.
The Animal and Plant Health Inspection Service (APHIS) protects and promotes U.S. agricultural health, regulates genetically engineered organisms, administers the Animal Welfare Act, and manages wildlife damage.
Phone number:
1-202-720-2511
The Antitrust Division promotes economic competition through enforcing and providing guidance on antitrust laws and principles.
Website:
Contact:
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The Appalachian Regional Commission works for sustainable community and economic development in Appalachia.
Website:
Phone number:
1-202-884-7700
The Architect of the Capitol manages and maintains the U.S. Capitol, the Capitol Visitor Center, the Senate Office Buildings, the House Office Buildings, the Supreme Court Building, the Library of Congress, the U.S. Botanic Garden, and the Capitol Grounds
Website:
Phone number:
1-202-228-1793
Contact:
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The National Archives and Records Administration preserves U.S. government records, manages the Presidential Libraries system, and publishes laws, regulations, Presidential, and other public documents.
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The U.S. Arctic Research Commission develops and recommends a national Arctic research policy.
Website:
Phone number:
1-703-525-0111
The Gulfport and Washington campuses of the Armed Forces Retirement Home (AFRH) are retirement centers for veterans of the U.S. military.
Website:
Phone number:
1-202-541-7501 (to contact a Washington, DC campus resident)
The under secretary of state for Arms Control and International Security serves as senior adviser to the president and the secretary of state for arms control, nonproliferation, and disarmament.
Phone number:
1-202-647-4000
The U.S. Army organizes, trains, and equips active duty and Reserve forces to preserve the peace, security, and defense of the United States.
Website:
Phone number:
1-703-695-6518
Contact:
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The Army Corps of Engineers provides public engineering services in peace and war to strengthen national security, energize the economy, and reduce risks from disasters.
Website:
Phone number:
1-202-761-0011
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The National Institute of Arthritis and Musculoskeletal and Skin Diseases supports research into the causes, treatment, and prevention of arthritis, musculoskeletal, and skin diseases.
Phone number:
1-301-495-4484
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