The International Quantum Structures Association (IQSA) is a society for the advancement and dissemination of structures based on quantum mechanics, in its physical, mathematical, philosophical, applied and interdisciplinary aspects, including the relevant aspects of: convex structures, logico-algebraic structures, orthomodular structures, quantum logics, empirical logics, operational structures, realistic structures, quantum measurement, quantum geometry, quantum statistics, quantum probability, quantum topology, quantum space time, quantum set theory, quantum information, quantum communication, quantum computation, fuzzy quantum logics.

The International Quantum Structures Association was founded in 1990.

Since then, the association has organised twelve biennial conferences, a satellite conference, and two intermediate conferences. The proceedings of these biennial conferences have all been published as special issues of the International Journal of Theoretical Physics.

The last Biennial IQSA Conference Quantum Structures 2018 took place in Kazan, Russian Federation, on July 16-20, 2018. The website of the Conference is available at