| Grabau | |
| Image Coa: | DEU Grabau (Stormarn) COA.svg |
| Coordinates: | 53.8056°N 10.2753°W |
| Image Plan: | Grabau in OD.svg |
| State: | Schleswig-Holstein |
| District: | Stormarn |
| Amt: | Bad Oldesloe-Land |
| Elevation: | 31 |
| Area: | 9.14 |
| Postal Code: | 23845 |
| Area Code: | 04537 |
| Licence: | OD |
| Gemeindeschlüssel: | 01 0 62 019 |
| Website: | www.amt-bad- oldesloe-land.de |
| Mayor: | Hans-Joachim Wendt |
Grabau is a municipality in the district of Stormarn, in Schleswig-Holstein, Germany.