Donald Fontana (1 January 1931 – 17 July 2015) was a former top-ranking Canadian tennis player from the 1950s and 1960s. Fontana was the year-ending number two ranked Canadian player six times, three times in the 1950s and three more in the 1960s. He was ranked in the Canadian top-ten five more times. He won the Canadian Open doubles championship three times, in 1955, 1957, and 1959 with compatriot Robert Bedard, and was a runner-up four more times. Don won the Ontario Open singles tennis championship twice, in 1956 and 1957. He was a Pan American Games competitor twice, in 1959 and 1963.