ACU

ACU may refer to:

Computing

Abilene Christian University, a private Christian university located in Abilene, Texas
Adichunchanagiri University, a private university located in Karnataka, India
Ahram Canadian University, a private Egyptian university located in 6th of October City, Giza, Egypt
Ajayi Crowther University, a private Christian university located in Oyo, Oyo State Nigeria
American City University in California or Wyoming
Arizona Christian University, a private Christian university located in Phoenix, Arizona
Association of Commonwealth Universities, an association that represents over 480 universities from Commonwealth countries
Australian Catholic University, Australia's only public Catholic university

Acu Publishing, an imprint of the German group VDM Publishing devoted to the reproduction of Wikipedia content
Altura Credit Union, a credit union in California
American Conservative Union, a political lobbying group in the US
Arab Customs Union, an organization under the Arab League for a Customs Union between Arab Members of the League
Asian Clearing Union, an organization that settles international payments between member countries
Assiniboine Credit Union, a credit union in Manitoba
Auto-Cycle Union, the governing body of motorcycle sport in Great Britain

Assault Craft Unit, military units of the US Navy that specialize in amphibious warfare
Army Combat Uniform, the combat uniform worn by the US Army, US Air Force, and US Space Force

Achutupo Airport, Achutupo, Panama (IATA code ACU)
Auto-Cycle Union, an officially recognised motorcycle governing body of the UK
Automovil Club del Uruguay, a member of the Fédération Internationale de l'Automobile

Açu, municipality in the state of Rio Grande do Norte, Brazil
Açu River, another name for the Piranhas River in Brazil
Pariquera-Açu, a municipality in the state of São Paulo in Brazil
Superporto do Açu, an industrial port complex in the state of Rio de Janeiro in Brazil