USA most commonly refers to the United States of America. The terms USA or Usa may also refer to: in government:

U.S.A. trilogy, a series of novels by American writer John Dos Passos

United States (essays) summary and related information.

United States Army

USA Today, an American newspaper.

Miss USA pageant, an annual beauty contest

Unconditional self-regard, concept in rational-emotive therapy

Union of South Africa, 1910 to 1961

United States Attorney

USA - Land of Opportunities, a trilogy of films by the Danish director Lars von Trier

United Soccer Association, a soccer league that played in USA in 1967

Unicycling Society of America, a society for unicylists

USA Network, an American cable television network

USA Perpignan, a French rugby union club that plays in the city of Perpignan in Pyrénées-Orientales

Conference USA (C-USA), a college athletic conference now largely composed of university athletic teams from the southern United States

University of South Alabama in the U.S. state of Alabama

University of South Australia,

USA3000 Airlines, an airline headquartered in Newtown Square, Pennsylvania, United States

USA Weekend, an American Sunday-newspaper supplement

The United States of America (album), by The United States of America (band)

Underwriting Service Assistant, a job description for Underwriters

USA (album), a musical album by King Crimson

United Spirit Arena, an arena in Lubbock, Texas

United Sciences of America, Inc., company cited for fraudulent practices

USA Funds, a nonprofit corporation that guarantees loans for student financial aid

United Space Alliance, a space operations company

Ultimate in Suspense and Action, a Philippine television channel, now known as "Jack TV", from the Solar Entertainment Corporation

Uniform Securities Act, American legislation designed to guide each state in drafting their own state securities law.

U-S-A! cheer, a patriotic chant

Usa, Oita (宇佐市; -shi), a city located in Oita, Japan.

Unionville-Sebewaing Area High School

Usa cho, Kochi (宇佐町；高知県), a town located in Kochi, Japan.

U.S.A. (United State of Atlanta), an album by the Ying Yang Twins

Underground Service Alert, a U.S. organization that coordinates the locating of underground utilities. The initials 'USA' are often seen spray-painted on the ground at proposed excavation sites in California, Nevada and Hawaii

Usa District, Oita (宇佐郡; -gun), a district located in Oita, Japan.

United Scenic Artists

United States of Africa, a political concept/proposal, similar to the European Union

USA is the ICAO designator for US Airways

United Seniors Association, commonly "USA Next," a senior citizen's advocacy group and rival to the AARP.

Usa (river), Hesse, a river in Germany