"Nordsee-Treene is an Amt (\"collective municipality\") in the district of Nordfriesland, in Schleswig-Holstein, Germany. Its seat is in Mildstedt. It was formed on 1 January 2008 from the former \u00C4mter Friedrichstadt (except the town Friedrichstadt), Hattstedt, Nordstrand and Treene.The Amt Nordsee-Treene consists of the following municipalities:"@en .