| Image Coa: | DEU Markt Rettenbach COA.svg |
| Coordinates: | 47.9475°N 10.395°W |
| Image Plan: | Markt Rettenbach in MN.svg |
| State: | Bayern |
| Region: | Schwaben |
| District: | Unterallgäu |
| Elevation: | 679 |
| Area: | 51.45 |
| Postal Code: | 87733 |
| Area Code: | 08392 |
| Licence: | MN |
| Gemeindeschlüssel: | 09 7 78 168 |
| Website: | www.markt-rettenbach.de |
| Mayor: | Martin Hatzelmann[1] |
| Leader Term: | 2020 - 26 |
Markt Rettenbach is a municipality and market town in the district of Unterallgäu in Bavaria, Germany.