Nils Engdahl (4 November 1898 – 10 September 1983) was a Swedish runner who competed at the 1920 and 1924 Summer Olympics.

He finished second behind Guy Butler in the 440 yards event at the British 1919 AAA Championships.

[4][5][6] At the Olympic Games, Engdahl had his best achievements in the 4 × 400 m relay, in which his teams finished fifth and second in 1920 and 1924, respectively.

He later married Olympic diver Signe Johansson.

This biographical article relating to Swedish athletics is a stub.