| Rain | |
| Image Coa: | Coat of arms of Rain (Niederbayern).svg |
| Coordinates: | 48.9°N 40°W |
| Image Plan: | Rain in SR.svg |
| State: | Bayern |
| Region: | Niederbayern |
| District: | Straubing-Bogen |
| Verwaltungsgemeinschaft: | Rain (Niederbayern) |
| Elevation: | 330 |
| Area: | 14.29 |
| Postal Code: | 94369 |
| Area Code: | 09429 |
| Licence: | SR |
| Gemeindeschlüssel: | 09 2 78 177 |
| Website: | www.gemeinde-rain.de |
| Mayor: | Anita Bogner[1] |
| Leader Term: | 2020 - 26 |
| Party: | ÖDP |
Rain is a municipality in the district of Straubing-Bogen in Bavaria, Germany. Former head of state of Hungary, Archduke Joseph August of Austria died here in 1962.