The Fédération internationale des associations vexillologiques (FIAV) is an international federation of 52 regional, national, and multinational vexillological associations and institutions across the globe. The translations of FIAV’s French name into the other three official FIAV languages are the International Federation of Vexillological Associations (English), the Internationale Föderation Vexillologischer Gesellschaften (German), and the Federación Internacional de Asociaciones Vexilológicas (Spanish).

FIAV unites those associations and institutions throughout the world whose object is the pursuit of vexillology, which is the creation and development of a body of knowledge about flags of all types, their forms and functions, and of scientific theories and principles based on that knowledge. FIAV’s purposes are: to create a strong bond among those associations and institutions and to encourage and coordinate their work, studies, and research; to promote the organization of International Congresses of Vexillology and to lend its support to their organizers; to encourage the creation in all countries of associations and institutions dedicated to vexillology; and to sanction international standards facilitating the development of these activities.