Perštejn lies approximately 23 kilometres (14 mi) south-west of Chomutov, 73 km (45 mi) south-west of Ústí nad Labem, and 99 km (62 mi) west of Prague.
Administrative parts
The villages of Černýš, Lužný, Ondřejov, Rájov, Údolíčko and Vykmanov are administrative parts of Perštejn.