Gustaf Fredrik Carlén (29 December 1890 – 8 January 1975) was a Swedish long-distance runner who competed in the 1912 Summer Olympics.

[1] He finished 21st in the individual cross country competition (ca.

This was the eighth-best Swedish result, so he was not awarded a medal in the team cross country competition, where only the best three were honoured.

12 km long; it was not made known to competitors before the race.

[2][3][4] This biographical article relating to Swedish athletics is a stub.