Comer William Parnell (14 February 1928 in Vancouver – 6 September 2008) was a Canadian middle distance runner who competed in the 1948 Summer Olympics and in the 1952 Summer Olympics.

He won the gold medal in the 1 mile race at the 1950 British Empire Games at Auckland.

In the 4×440 yards Relay (with Don Pettie, Jack Hutchins, and Bill LaRochelle) Parnell finished fifth.

In the 1954 British Empire and Commonwealth Games 880 yards he finished seventh and in the 1954 British Empire and Commonwealth Games 1 mile he was eliminated in the heats.

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