| Erik Byléhn | |
| Birth Date: | 15 January 1898 |
| Birth Place: | Bollnäs, Sweden |
| Death Date: | 14 November 1986 (aged 88) |
| Death Place: | Uppsala, Sweden |
| Height: | 1.72 m |
| Weight: | 61 kg |
| Sport: | Athletics |
| Event: | 400 m, 800 m |
| Pb: | 400 m – 48.7 (1924) 800 m – 1:52.8e (1928)[1] |
| Club: | SoIK Hellas |
| Show-Medals: | yes |
Bror Erik Byléhn (15 January 1898 – 14 November 1986) was a middle-distance runner from Sweden who competed at the 1924 and 1928 Olympics.[2] In 1924 he won a silver medal in the 4 × 400 m relay and failed to reach the finals of individual 400 m and 800 m races. Four years later he won a silver medal in the 800 m, whereas his 4 × 400 m team finished in fourth place.[3]
Byléhn worked as a veterinary doctor in Karlstad, and later moved to the United States.[4]