Assumption University is a Roman Catholic university in Windsor, Ontario, federated with the University of Windsor. It was founded in 1857 as Assumption College by the Society of Jesus and incorporated by an Act of the Parliament of Upper Canada, receiving Royal Assent, August 16, 1858. It entered an association with an Ontario university as the Assumption College of the University of Western Ontario (1920-1953) then became the Assumption University of Windsor in 1956, before changing its name again in 1964. When the University of Windsor was established as a secular public university in 1963, Assumption University entered into federation with the newly formed university. Assumption University also remains affiliated with Canterbury College (Anglican) and Iona College (Interfaith). Assumption University is a full member of the Association of Catholic Colleges and Universities in Canada (ACCUC). In 2024, Assumption University was admitted as a member of the Association of Catholic Colleges and Universities.

Catholic higher education includes universities, colleges, and other institutions of higher education privately run by the Catholic Church, typically by religious institutes. Those tied to the Holy See are specifically called pontifical universities.