| Rethwisch | |
| Image Coa: | DEU Rethwisch (Stormarn) COA.svg |
| Coordinates: | 53.7828°N 10.4425°W |
| Image Plan: | Rethwisch in OD.svg |
| State: | Schleswig-Holstein |
| District: | Stormarn |
| Amt: | Bad Oldesloe-Land |
| Elevation: | 29 |
| Area: | 13.24 |
| Postal Code: | 23847 |
| Area Code: | 04539 |
| Licence: | OD |
| Gemeindeschlüssel: | 01 0 62 062 |
| Divisions: | 7 |
| Website: | www.amt-bad- oldesloe-land.de |
| Mayor: | Jens Poppinga |
| Party: | CDU |
Rethwisch is a municipality in the district of Stormarn, in Schleswig-Holstein, Germany.