Atlantic University Sport (AUS; French: Sport universitaire de l'Atlantique) is a regional membership association for universities in Atlantic Canada which assists in co-ordinating competition between their university level athletic programs and providing contact information, schedules, results, and releases about those programs and events to the public and the media.

This is similar to what would be called a college athletic conference in the United States.

The other three regional associations coordinating university-level sports in Canada are Ontario University Athletics (OUA), the Canada West Universities Athletic Association (CW), and the Réseau du sport étudiant du Québec (RSEQ).

Prior to the acceptance of Memorial University of Newfoundland, the AIAA, which dates back to the late 19th century, was known as the Maritime Intercollegiate Athletic Association.

The AUS accepted its first ever single-sport member at the start of the 2017–18 school year, when the Bishop's Gaiters football team transferred from the Réseau du sport étudiant du Québec (RSEQ).