Stanisława Walasiewicz, also known as Stefania Walasiewicz, and Stella Walsh, was a Polish-American track and field athlete, who became a women's Olympic champion in the 100 metres. Born in Poland and raised in the United States, she became an American citizen in 1947.

The 100 metres at the Summer Olympics has been contested since the first edition of the multi-sport event. The men's 100 metres has been present on the Olympic athletics programme since 1896. The 100 metres is considered one of the blue ribbon events of the Olympics and is among the highest profile competitions at the games. It is the most prestigious 100 metres race at an elite level and is the shortest sprinting competition at the Olympics – a position it has held at every edition except for a brief period between 1900 and 1904, when a men's 60 metres was contested.