Max Ellmer (1909 – 1984) was a Swiss tennis player in the years before and after World War 2.

Ellmer had a powerful backhand and good footwork. He played Davis Cup for Switzerland from 1933 to 1938. He won the Swiss Championships four times (1932, 1934, 1935 and 1936).^[1] He played at the French Championships and Wimbledon in a Grand Slam singles career that spanned the years 1930 to 1949. At the French Championships in 1934, Ellmer beat the 13th seed Wilmer Hines and won a set from eventual winner Gottfried von Cramm in losing in the fourth round.^[2] At Wimbledon in 1938, Ellmer beat 6th seed Dragutin Mitić in five sets before losing in straight sets to Bunny Austin in the quarter-finals. Ellmer beat former champion Jack Crawford in round one of the Wimbledon men's singles in 1947 before losing in the second round.^[3]