Neustadt borders in the north on the community of Gilserberg, in the east on the town of Schwalmstadt and the community of Willingshausen (all three in the Schwalm-Eder-Kreis), in the southeast on the community of Antrifttal, in the south on the town of Kirtorf (both in the Vogelsbergkreis), and in the west on the town of Stadtallendorf (Marburg-Biedenkopf).