- AGO stands for Art Gallery of Ontario
- AGO stands for Attorney General’s Office (State of Washington)
- AGO stands for Angola (ISO Country code)
- AGO stands for American Guild of Organists
- AGO stands for Australian Greenhouse Office
- AGO stands for Assembléia Geral Ordinária (Ordinary General Meeting; Brazil)
- AGO stands for Adjutant General’s Office (USA)
- AGO stands for Attorney General Opinion
- AGO stands for Assicurazione Generale Obbligatoria (Italian: Mandatory General Insurance)
- AGO stands for Acquisition and Grants Office (US NOAA)
- AGO stands for Richard Gilder Graduate School (American Museum of Natural History; New York)
- AGO stands for Australian Geospatial-Intelligence Organisation (Australia)
- AGO stands for Air Ground Operations
- AGO stands for Alpha Gamma Omega (Christian fraternity)
- AGO stands for Automotive Gas Oil
- AGO stands for Agenzia Giornalistica Online (Italian: Journalistic Agency Online)
- AGO stands for Aims, Goals, Objectives (education)
- AGO stands for Armygeddon (gaming clan)
- AGO stands for Accumulated Generating Operation
- AGO stands for Arresting Gear Officer (US Navy)
- AGO stands for Automated Geophysical Observatory
- AGO stands for Arbeitsgemeinschaft Gynäkologische Onkologie eV (Munich, Germany)
- AGO stands for Administrative Grant Officer
- AGO stands for Arresting Gear Operator
- AGO stands for American Gastroenterological Organization
- AGO stands for Santiago, Chile STDN Station
- AGO stands for Audit et Gestion Opérationnels (French: Audit and Operational Management; University of Lyon)
- AGO stands for Alpine Grand Ouest (French automobile association)
AGO