The outdoor women's singles competition at the 1912 Summer Olympics was part of the tennis program for the games. It was held from 1 to 4 July at Östermalms IP. 12 women from 5 nations entered, but only 8 players from 4 nations actually competed. The event was won by Marguerite Broquedis of France, the nation's first victory in the women's singles. Dorothea Köring of Germany took silver and Molla Mallory of Norway earned bronze; both nations were making their debut in women's singles.

Marguerite Marie Broquedis was a French tennis player. In major tournaments she won the singles title at the 1912 World Hard Court Championships, and the mixed doubles at the 1927 French Championships.