Krempermarsch or Kremper Marsch is an Amt ("collective municipality") in the county of Steinburg, in Schleswig-Holstein, Germany. It is situated between Itzehoe and Glückstadt. The seat of the Amt is in the town Krempe.
The Amt Krempermarsch consists of the following municipalities (population in 2005 between brackets):
- Bahrenfleth (606)
- Dägeling (1,016)
- Elskop (157)
- Grevenkop /348)
- Krempe (2,447)
- Kremperheide (2,547)
- Krempermoor (530)
- Neuenbrook (688)
- Rethwisch (618)
- Süderau (792)
