William M. Sawchuk (born January 8, 1959) is a Canadian former swimmer, competing in the butterfly, freestyle and medley events during the 1970s and early 1980s.

In his international debut as a 16-year-old at the 1975 Pan American Games in Mexico City, he won a bronze medal for his third-place finish in the 200-metre individual medley.

[2] At the 1981 NCAA Swimming Championships, Sawchuk, together with Gator teammates John Hillencamp, Geoff Gaberino and David Larson, won the national title in the 800-yard freestyle relay.

Sawchuk qualified for the 1980 Canadian Olympic team, but was unable to compete at the 1980 Summer Olympics in Moscow when Canada joined the United States-led boycott over the Soviet Union's invasion of Afghanistan.

[3] Sawchuk returned to the University of Florida after the 1980 Olympics, and graduated with a bachelor's degree in exercise and sport science in 1984.