| Frauenau | |
| Image Coa: | Wappen Frauenau.svg |
| Coordinates: | 48.9833°N 31°W |
| Image Plan: | Frauenau in REG.svg |
| State: | Bavaria |
| Region: | Niederbayern |
| District: | Regen |
| Elevation: | 616 |
| Area: | 60.14 |
| Postal Code: | 94258 |
| Area Code: | 09926 |
| Licence: | REG |
| Gemeindeschlüssel: | 09 2 76 121 |
| Website: | www.frauenau.de |
| Mayor: | Fritz Schreder[1] |
| Leader Term: | 2020 - 26 |
Frauenau is a municipality in the district of Regen, in Bavaria, Germany. It is known for its artificial lake, which is used as a water supply of the area around Deggendorf and Passau.