Unterach
Unterach stands for:
- Unterach am Attersee , municipality in the Vöcklabruck district in Upper Austria
- Unterach (Rehling) , part of the community Rehling in the district of Aichach-Friedberg in Swabia, Bavaria
- Unterach (ship, 1870) , side paddle wheel passenger ship, built in 1870, last in service for the Attersee shipping , scrapped in 1979
- Unterach (ship, 1970) , passenger ship built in 1970, from 1984 on the Attersee