CUSA may refer to:
Kues, town in Germany Nicholas of Cusa (1401–1464), German philosopher, theologian, jurist, and astronomer Carleton University Students' Association, Carleton University in Ottawa, Ontario, Canada Colleges and Universities Sports Association, a collegiate athletic conference in the Philippines Conference USA, a collegiate athletic conference in the United States Council of Unions of South Africa, a former South African trade union federation Canada and the United States; see Cavitron Ultrasonic Surgical Aspirator