| Rettenbach | |
| Image Coa: | DEU Rettenbach COA.svg |
| Coordinates: | 48.4667°N 31°W |
| Image Plan: | Rettenbach in GZ.svg |
| State: | Bayern |
| Region: | Schwaben |
| District: | Günzburg |
| Elevation: | 439-501 |
| Area: | 12.75 |
| Postal Code: | 89364 |
| Area Code: | 08224 |
| Licence: | GZ |
| Gemeindeschlüssel: | 09 7 74 174 |
| Mayor: | Sandra Dietrich-Kast[1] |
| Leader Term: | 2020 - 26 |
| Party: | CSU |
Rettenbach is a municipality in the district of Günzburg in Bavaria in Germany. The following Gemarkungen exist: Harthausen, Remshart, Rettenbach.