Louhi is a queen in Finnish mythology and the mythology of Lapland.
Louhi may also refer to
- Finnish minelayer Louhi, built in 1916
- Finnish pollution control vessel Louhi, built in 2011
- Loukhi (Finnish and Karelian: Louhi), an urban locality in the Loukhsky District, Republic of Karelia, Russia
- Louhi, a fictional character in the video game Final Fantasy: The 4 Heroes of Light
- 3897 Louhi, a minor planet