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| Birth Date: | 1908 5, df=y |
| Birth Place: | Helsinki, Finland |
| Death Place: | Helsinki, Finland |
| Sport: | Speed skating |
| Pb: | 500 m – 45.0 (1931) 1500 m – 2:22.8 (1932) 5000 m – 8:36.6 (1936) 10000 m – 17:42.4 (1936) |
| Club: | Helsingin Luistelijat, Helsinki |
| Show-Medals: | yes |
Ossian Olavi "Ossi" Blomqvist (12 May 1908 – 3 October 1955) was a Finnish speed skater who won two silver medals at the European all-around championships in 1931 and 1932. He competed over various distances at the 1928, 1932 and 1936 Winter Olympics with the best results of fifth-sixth place in the 5000 m and 10000 m events in 1936. He served as the flag bearer for Finland at the 1932 games. At the world all-around championships Blomqvist placed fifth and seventh in 1931 and 1932, respectively.