| Image Coa: | Postau coat of arms.svg |
| Coordinates: | 48.65°N 32°W |
| Image Plan: | Postau in LA.svg |
| State: | Bayern |
| Region: | Niederbayern |
| District: | Landshut |
| Verwaltungsgemeinschaft: | Wörth a.d.Isar |
| Elevation: | 388 |
| Area: | 34.84 |
| Postal Code: | 84103 |
| Area Code: | 08702 |
| Licence: | LA |
| Gemeindeschlüssel: | 09 2 74 174 |
| Divisions: | 5 Ortsteile |
| Website: | www.postau.de |
| Mayor: | Johann Angstl[1] |
| Leader Term: | 2020 - 26 |
Postau is a municipality in the district of Landshut in Bavaria in Germany.