| Image Coa: | Wappen Unterbreizbach.png |
| Coordinates: | 50.8167°N 68°W |
| Image Plan: | Unterbreizbach in WAK.png |
| State: | Thüringen |
| District: | Wartburgkreis |
| Elevation: | 240 |
| Area: | 30.00 |
| Postal Code: | 36414 |
| Area Code: | 036962 |
| Licence: | WAK |
| Gemeindeschlüssel: | 16 0 63 078 |
| Website: | www.unterbreizbach.de |
| Mayor: | Roland Ernst[1] |
| Leader Term: | 2024 - 30 |
| Party: | SPD |
Unterbreizbach is a municipality in the Wartburgkreis district of Thuringia, Germany.