| Image Coa: | Wappen Bad Birnbach.svg |
| Coordinates: | 48.45°N 18°W |
| Image Plan: | Bad Birnbach in PAN.svg |
| State: | Bayern |
| Region: | Niederbayern |
| District: | Rottal-Inn |
| Verwaltungsgemeinschaft: | Bad Birnbach |
| Elevation: | 376 |
| Area: | 68.81 |
| Postal Code: | 84364 |
| Area Code: | 08563 |
| Licence: | PAN |
| Gemeindeschlüssel: | 09 2 77 113 |
| Website: | www.badbirnbach.de |
| Mayor: | Dagmar Feicht[1] |
| Leader Term: | 2020 - 26 |
| Party: | CSU |
Bad Birnbach is a municipality in the district of Rottal-Inn in Bavaria in Germany.