| Type: | Ortsteil |
| Town: | Steinbach-Hallenberg |
| Coordinates: | 50.7167°N 45°W |
| State: | Thüringen |
| District: | Schmalkalden-Meiningen |
| Elevation: | 490 |
| Area: | 5.91 |
| Population: | 485 |
| Stand: | 2017-12-31 |
| Postal Code: | 98587 |
| Area Code: | 036847 |
Unterschönau is a village and a former municipality in the district Schmalkalden-Meiningen, in Thuringia, Germany. Since 1 January 2019, it is part of the town Steinbach-Hallenberg.
From 1868 to 1944, Unterschönau was part of the Prussian Province of Hesse-Nassau.