| Kastorf | |
| Image Coa: | DEU Kastorf COA.svg |
| Coordinates: | 53.7492°N 10.5706°W |
| Image Plan: | Kastorf in RZ.svg |
| State: | Schleswig-Holstein |
| District: | Herzogtum Lauenburg |
| Amt: | Berkenthin |
| Elevation: | 29 |
| Area: | 6.9 |
| Postal Code: | 23847 |
| Area Code: | 04501 |
| Licence: | RZ |
| Gemeindeschlüssel: | 01 0 53 061 |
| Website: | www.amt- berkenthin.de |
| Mayor: | Wolfgang Wiedenhöft |
| Party: | SPD |
Kastorf is a municipality in the district of Lauenburg, in Schleswig-Holstein, Germany.