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Nordstormarn is an Amt ("collective municipality") in the district of Stormarn, in Schleswig-Holstein, Germany. It is situated around Reinfeld, which is the seat of the Amt, but not part of it.

The Amt Nordstormarn consists of the following municipalities:

v t e Collective municipalities of Schleswig-Holstein in Germany
The Ämter are listed per district (Kreis)
Dithmarschen	Burg-Sankt Michaelisdonn Büsum-Wesselburen Eider Heider Umland Marne-Nordsee Mitteldithmarschen
Herzogtum Lauenburg	Berkenthin Breitenfelde Büchen Hohe Elbgeest Lauenburgische Seen Lütau Sandesneben-Nusse Schwarzenbek-Land
Nordfriesland	Eiderstedt Föhr-Amrum Landschaft Sylt Mittleres Nordfriesland Nordsee-Treene Pellworm Südtondern Viöl
Ostholstein	Großer Plöner See Lensahn Oldenburg-Land Ostholstein-Mitte
Pinneberg	Elmshorn-Land Geest und Marsch Südholstein Hörnerkirchen Pinnau Rantzau
Plön	Bokhorst-Wankendorf Großer Plöner See Lütjenburg Preetz-Land Probstei Schrevenborn Selent/Schlesen
Rendsburg-Eckernförde	Achterwehr Bordesholm Dänischenhagen Dänischer Wohld Eiderkanal Eidertal Fockbek Hohner Harde Hüttener Berge Jevenstedt Mittelholstein Nortorfer Land Schlei-Ostsee
Schleswig-Flensburg	Arensharde Eggebek Geltinger Bucht Haddeby Hürup Kappeln-Land Kropp-Stapelholm Langballig Mittelangeln Oeversee Schafflund Südangeln Süderbrarup
Segeberg	Auenland Südholstein Bad Bramstedt-Land Boostedt-Rickling Bornhöved Itzstedt Kisdorf Leezen Trave-Land
Steinburg	Breitenburg Horst-Herzhorn Itzehoe-Land Kellinghusen Krempermarsch Schenefeld Wilstermarsch
Stormarn	Bad Oldesloe-Land Bargteheide-Land Itzstedt Nordstormarn Siek Trittau

53°50′N 10°31′E / 53.833°N 10.517°E / 53.833; 10.517