Kynšperk nad Ohří (Czech pronunciation: [ˈkɪnʃpɛrk ˈnat oɦr̝iː]; German: Königsberg an der Eger) is a town in Sokolov District in the Karlovy Vary Region of the Czech Republic.

Kynšperk nad Ohří consists of eight municipal parts (in brackets population according to the 2021 census):[2] Kynšperk nad Ohří is located about 10 kilometres (6 mi) southwest of Sokolov and 28 km (17 mi) southwest of Karlovy Vary.

The southeastern part of the municipal territory extends into the Slavkov Forest and includes the highest point of Kynšperk nad Ohří at 580 m (1,900 ft) above sea level.

The town's founding charter is the oldest preserved document of establishing a locality in the Czech Republic and is stored in the National Archives in Prague.

Kynšperk nad Ohří is located on the main railway lines Prague–Cheb and Plzeň–Karlovy Vary.