Südermarsch

Infobox Ort in Deutschland
image_photo =
Wappen = kein
lat_deg = 54 |lat_min = 25
lon_deg = 9 |lon_min = 4
Lageplan = Suedermarsch in NF.pngBundesland = Schleswig-Holstein
Kreis = Nordfriesland
Amt = Nordsee-Treene
Höhe = 0
Fläche = 30.66
Einwohner = 148
Stand = 2006-12-31
PLZ = 25813
Vorwahl = 04841
Kfz = NF
Gemeindeschlüssel = 01 0 54 132
Adresse-Verband = Schulweg 19
25866 Mildstedt
Website = [http://www.amt-treene.de/ www.amt-treene.de]
Bürgermeister = Karl-Jochen Maas

Südermarsch is a municipality in the district of Nordfriesland, in Schleswig-Holstein, Germany.