Sudmerberg is a quarter (Stadtteil) of Goslar in Lower Saxony, Germany, named after a prominent 354 m (1,161 ft)-metre-high hill to the east.

The Abzucht stream runs between the Sudmerberg hill, rising in the east, and the northern edge of the Harz mountains.

An early medieval lowland castle, located at the confluence of the Abzucht and the Oker, was first mentioned as Sudburg in a 1064 deed issued by King Henry IV of Germany.

In April 1935, Goslar's town council issued a development plan for the Sudmerberg settlement, mainly for employees of the nearby Rammelsberg ore mine (Preussag) and the Oker ironworks.

Though construction works ceased during World War II, from 1948 onwards numerous refugee families found homes in Sudmerberg.