Peter Sprott Firstbrook (May 11, 1933 – February 22, 1985) was a Canadian figure skater. As a single skater, he was the 1951–1953 Canadian national champion. He placed 5th at the 1952 Winter Olympics. He was one of the few skaters to win the Canadian Junior and Senior titles in consecutive years. Firstbrook also competed as a pair skater. With partner Mary Kenner, he was the 1947 Canadian junior bronze medalist.