| Oiva Halmetoja | |
| Nationality: | Finnish |
| Sport: | Athletics |
| Event: | Hammer throw |
| Birth Date: | 31 March 1920 |
| Birth Place: | Maaninka, Finland |
| Death Place: | Varkaus, Finland |
Oiva Halmetoja (31 March 1920 - 21 February 2007) was a Finnish athlete. He competed in the men's hammer throw at the 1952 Summer Olympics.[1]