Peter Sprott Firstbrook (May 11, 1933 – February 22, 1985) was a Canadian figure skater.

[1] He was one of the few skaters to win the Canadian Junior and Senior titles in consecutive years.

With partner Mary Kenner, he was the 1947 Canadian junior bronze medalist.

With partners Mary Kenner, Vera Smith, and Peter Dunfield, he won the silver medal at the 1949 North American Figure Skating Championships.

He died of pneumonia on February 22, 1985, in Guanajuato, Mexico, where he had been living in an artists' community.