Rossum is a village in the Dutch province of Overijssel. It is a part of the municipality of Dinkelland, and lies about 4 km north of Oldenzaal on the road to Ootmarsum. It was first mentioned in the late-10th century as Rohthem, and means "settlement near cleared forest". In 1840, it was home to 504 people. The Hunenborg is a circular rampart to the north of Rossum. In 1916, remnants of wooden buildings were discovered at the site.