The (outdoor) men's singles competition at the 1912 Summer Olympics was part of the tennis program for the games. There were 49 competitors from 12 nations. Nations were limited to 8 players each. The event was won by Charles Winslow in an all-South African final over Harold Kitson; they were the nation's first medals in the men's singles. Oscar Kreuzer of Germany won the bronze-medal match against Bohemian Ladislav Žemla.

Germany competed at the 1912 Summer Olympics in Stockholm, Sweden. 185 competitors, 180 men and 5 women, took part in 69 events in 14 sports. Due to the political fallout from World War I, this was the country's last appearance until 1928.