The Avro Canada CF-103 was a proposed Canadian interceptor, designed by Avro Canada in the early 1950s as a development, and possible replacement of the company's CF-100 Canuck, that was entering service at the time with the Royal Canadian Air Force (RCAF). Although intended to be capable of flying at transonic speeds, the CF-103 only offered a moderate increase in performance and capability over the CF-100; subsequently, the aircraft never progressed beyond the mock-up stage.

Avro Canada was a Canadian aircraft manufacturing company. It was founded in 1945 as an aircraft plant and within 13 years became the third-largest company in Canada, one of the largest 100 companies in the world, and directly employing over 50,000. Avro Canada was best known for the CF-105 Arrow, but through growth and acquisition, it rapidly became a major, integrated company that had diverse holdings.