Altenstadt an der Waldnaab is a municipality in Neustadt an der Waldnaab in Bavaria, Germany. It is on the river Waldnaab, 2 km (1.2 mi) southeast of Neustadt an der Waldnaab, and 5 km (3.1 mi) north of Weiden in der Oberpfalz. Bundesautobahn 93 passes west of Altenstadt. It has a railway station on the Weiden–Oberkotzau railway.