Eider (Amt Kirchspielslandgemeinde)  Kirchspielslandgemeinden Eider is an "Amt" ("collective municipality") in the district of Dithmarschen, in Schleswig-Holstein, Germany. Its seat is in Hennstedt. It was formed on 1 January 2008 from the former "Ämter" Kirchspielslandgemeinde Hennstedt, Kirchspielslandgemeinde Lunden and Kirchspielslandgemeinde Tellingstedt. The "Amt" is named after the Eider River. The "Amt" Kirchspielslandgemeinden Eider consists of the following municipalities (with population in 2005):