La Internacia Geografia Unio (angleInternational Geographical Union (IGU); franceUnion Géographique Internationale (UGI)) estas internacia geografia societo. La unua Internacia Geografia Kongreso okazis en Antverpeno en 1871. Postaj kunsidoj kondukis al establigo de permanenta organizaĵo en Bruselo, Belgio, en 1922.
African Studies Commission•Agricultural Geography and Land Engineering Commission•Applied Geography Commission•Biogeography and Biodiversity Commission•Climatology Commission•Coastal Systems Commission•Cold and High Altitude Regions Commission•Cultural Approach in Geography Commission•Dynamics of Economic Spaces Commission•Environment Evolution Commission•Gender and Geography: Care, Connection and Change Commission•Geographical Education Commission•Geographical Information Science Commission•Geography for Future Earth: Coupled Human-Earth Systems for Sustainability Commission•Geography of Governance Commission•Geography of Information, Innovation and Technology Commission•Geography of Tourism, Leisure, and Global Change Commission•Geoheritage and Parks Commission•Geomorphology and Society: Past, Present and Future Commission•Global Change and Human Mobility Commission•Global Understanding Commission•Hazard and Risk Commission•Health and Environment Commission•History of Geography Commission•Islands Commission•Karst Commission•Land Degradation and Desertification Commission•Landscape Analysis and Landscape Planning Commission•Land Use and Land Cover Change Commission•Latin American and Caribbean Studies Commission•Local and Regional Development Commission•Marginalization, Globalization, and Regional and Local Responses Commission•Mediterranean Basin Commission•Modelling Geographical Systems•Mountain Studies Commission•Political Geography Commission•Population Geography Commission•Research Methods in Geography Commission•Sustainability of Rural Systems Commission•Toponymy Commission•Transport and Geography Commission•Urban Commission•Water Sustainability Commission•Informality, Social Change and Development Commission vd
La Internacia Geografia Unio aliĝis al la Internacia Scienca Konsilantaro (ISK), kiun ĝi agnoskas kiel kunordiga korpuso por internaciaj organizoj de scienco.