| Birth Date: | 29 March 1888 |
| Birth Place: | Vänersborg, Sweden |
| Death Date: | 4 September 1964 (aged 76) |
| Death Place: | Vänersborg, Sweden |
| Height: | 1.7m (05.6feet) |
| Weight: | 62kg (137lb) |
| Sport: | Athletics |
| Event: | 3000–10000 m |
| Club: | Vänersborgs IF |
| Pb: | 5000 m – 15:29.2 (1912) 10000 m – 32:12.1 (1912) |
| Show-Medals: | yes |
Bror Karl Fock (29 March 1888 – 4 September 1964) was a Swedish long-distance runner who competed at the 1912 Summer Olympics held in Stockholm in the 3000 m, 10000 m and cross-country events. He finished seventh in the 3000 m, earning a silver medal with the Swedish team, and 17th in the cross country race. Although Sweden won the cross-country team event, Fock did not receive a medal because only the three best runners from each team were counted, while he was seventh.[1]
In 1912, Fock briefly held the world record over 3000 m. He won the national 10000 m title in 1909, 1910 and 1912, placing second in 1911 and 1913.