| Oscar Sumelius | |
| Nationality: | Finnish |
| Sport: | Sailing |
| Birth Date: | 26 April 1894 |
| Birth Place: | Tampere, Finland |
| Death Place: | Helsinki, Finland |
Oscar Sumelius (26 April 1894 - 7 August 1959) was a Finnish sailor. He competed in the 8 Metre event at the 1936 Summer Olympics.[1]