| Image Coa: | Krummendiek-Wappen.png |
| Coordinates: | 53.9453°N 9.4172°W |
| Image Plan: | Krummendiek in IZ.png |
| State: | Schleswig-Holstein |
| District: | Steinburg |
| Amt: | Itzehoe-Land |
| Elevation: | 1 |
| Area: | 1.78 |
| Postal Code: | 25554 |
| Area Code: | 04823 |
| Licence: | IZ |
| Gemeindeschlüssel: | 01 0 61 059 |
| Website: | www.amtitzehoe- land.de |
| Mayor: | Hans-Peter Boie |
Krummendiek is a municipality in the district of Steinburg, in Schleswig-Holstein, Germany.