| Image Coa: | DEU Unterreit COA.svg |
| Coordinates: | 48.1167°N 32°W |
| Image Plan: | Unterreit in MÜ.svg |
| State: | Bayern |
| Region: | Oberbayern |
| District: | Mühldorf am Inn |
| Verwaltungsgemeinschaft: | Gars am Inn |
| Elevation: | 478-560 |
| Area: | 32.20 |
| Postal Code: | 83567 |
| Area Code: | 08073 |
| Licence: | MÜ |
| Gemeindeschlüssel: | 09 1 83 147 |
| Website: | www.unterreit.de |
| Mayor: | Christian Seidl[1] |
| Leader Term: | 2020 - 26 |
| Party: | FW |
Unterreit is a municipality in the district of Mühldorf in Bavaria in Germany.