The American Association of Geographers (AAG) is a non-profit scientific and educational society aimed at advancing the understanding, study, and importance of geography and related fields. Its headquarters is located in Washington, D.C. The organization was founded on December 29, 1904, in Philadelphia, as the Association of American Geographers, with the American Society of Professional Geographers later amalgamating into it in December 1948 in Madison, Wisconsin. As of 2020, the association has more than 10,000 members, from nearly 100 countries. AAG members are geographers and related professionals who work in the public, private, and academic sectors.

Geography is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. Geography has been called "a bridge between natural science and social science disciplines."