Nils Engdahl (4 November 1898 – 10 September 1983) was a Swedish sprinter who competed at the 1920 and 1924 Summer Olympics in six 100–800 m events in total. He had his best achievements in the 4×400 m relay, in which his teams finished fifth and second in 1920 and 1924, respectively. Individually he won a bronze medal in the 400 m in 1920.Together with his brother, Wilhelm "Wille" Engdahl, Nils Engdahl played football for IFK Stockholm before changing to athletics in 1917.