Dan Waern (born 17 January 1933) is a retired Swedish middle-distance runner, who in 1957 became the first Swede to run a sub-four-minute mile.

[3] The same year he was awarded the Svenska Dagbladet Gold Medal.

[1][4] Waern competed in the 1500 m at the 1956 and 1960 Olympics and finished fourth in 1960.

[5][6] Earlier in 1958 he won a silver medal at the European championships over 1500 m and set a world record in the 1000 m.[1] In 1961, he was disqualified by the IAAF for professionalism.

[7] Waern held Swedish titles in the 800 m (1958–60) and 1500 m (1956–61).