| Image Coa: | DEU Ritzerau COA.svg |
| Coordinates: | 53.6644°N 10.5686°W |
| Image Plan: | Ritzerau in RZ.svg |
| State: | Schleswig-Holstein |
| District: | Herzogtum Lauenburg |
| Amt: | Sandesneben-Nusse |
| Elevation: | 38 |
| Area: | 11.11 |
| Postal Code: | 23896 |
| Area Code: | 04543 |
| Licence: | RZ |
| Gemeindeschlüssel: | 01 0 53 101 |
| Website: | www.amt- sandesneben- nusse.de |
| Mayor: | Gerd Holz |
Ritzerau is a municipality in the district of Lauenburg, in Schleswig-Holstein, Germany.