The village developed next to a 10th-century water castle at the Schunter river, probably erected by the Counts of Haldensleben who then held the office of margraves of the Northern March.

Gertrud von Haldensleben's daughter, Hedwig of Formbach, married Count Gebhard of Supplinburg.

It remained a commandry (Komturei) of the Order of Saint John until in 1820 it was finally mediatised to the Duchy of Brunswick.

The castle was demolished about 1875, while the St John Church survived, today a stop at the scenic Romanesque Road.

Süpplingenburg can be reached via the Bundesstraße 1 federal highway at Süpplingen or the Bundesautobahn 2 at the Rennau junction.