| Party: | Social Democratic Party of Finland |
| Constituency Mp: | Satakunta |
| Term Start: | 17 April 2019 |
| Parliament: | Finnish |
| Birth Date: | 18 August 1980 |
| Birth Place: | Kankaanpää, Satakunta, Finland |
Heidi Viljanen (born 18 August 1980 in Kankaanpää) is a Finnish politician currently serving in the Parliament of Finland for the Social Democratic Party of Finland at the Satakunta constituency.[1]