| Óscar Viel y Toro | |
| Birth Date: | c. 1837 |
| Birth Place: | Santiago, Chile |
| Death Date: | September 1, 1892 |
| Death Place: | Paris, France |
| Allegiance: |  Chile |
| Branch: | Chilean Navy |
| Serviceyears: | 1854–1891 |
| Rank: | Counter admiral |
| Battles: | Chincha Islands War War of the Pacific |
| Spouse: | Manuela Cavero Núñez |
| Children: | Óscar Viel Cavero, Teresa Viel Cavero |
Óscar Viel y Toro (c. 1837 – September 1, 1892) was a Chilean navy officer. From 1867 to 1874 he was governor of governor of Punta Arenas in the Straits of Magellan.[1]