Horst-Herzhorn is an Amt (collective municipality) in the district of Steinburg, in Schleswig-Holstein, Germany.
The seat of the Amt is in Horst.
Before 1 January 2008, when it was merged with the Amt Herzhorn, it was named Amt Horst.
The Amt Horst-Herzhorn consists of the following municipalities:
This Steinburg location article is a stub.