Sønder-Vilstrup is a place, that after the Versailles Treaty belonged to Denmark and was situated in the administrative region Haderslev.
Sønder-Vilstrup was formerly part of the German Empire. In the German Empire, the place was called Süder-Wilstrup. The place is now called Sønder Vilstrup (Haderslev-S. Vilstr.) and belongs to Denmark.