| Süderlügum Sønder Løgum | |
| Image Coa: | DEU Süderlügum COA.svg |
| Coordinates: | 54.8667°N 63°W |
| Image Plan: | Suederluegum in NF.PNG |
| State: | Schleswig-Holstein |
| District: | Nordfriesland |
| Amt: | Südtondern |
| Elevation: | 14 |
| Area: | 26.59 |
| Postal Code: | 25923 |
| Area Code: | 0 46 63 |
| Licence: | NF |
| Gemeindeschlüssel: | 01 0 54 131 |
| Website: | www.suederluegum.de |
| Mayor: | Rainer Eggers |
| Party: | CDU |
Süderlügum (Danish: Sønder Løgum; Mooring North Frisian: Läigem or Sööderläigem; Wiedingharde North Frisian: Leegem) is a municipality in the district of Nordfriesland, in Schleswig-Holstein, Germany. It is situated near the border with Denmark, approximately 35 km west of Flensburg, and 7 km southeast of Tønder.
Süderlügum is part of the amt (collective municipality) of Südtondern.
Süderlügum lies on the Marsh Railway and offers connections to Niebüll and Tondern.