Výsluní (earlier also Suniperk; German: Sonnenberg) is a town in Chomutov District in the Ústí nad Labem Region of the Czech Republic.

Výsluní consists of six municipal parts (in brackets population according to the 2021 census):[2] Výsluní is located about 11 kilometres (7 mi) west of Chomutov and 36 km (22 mi) northeast of Karlovy Vary.

Silver, copper, tin and lead ores had been mined in the vicinity of Výsluní since the 14th century.

[6] It dominates the town and is visible on the southern slope of the mountains far into the Most Basin.

[3] The town's church appeared in many film works: The Borgias, Henri 4, Year of the Devil, Forgotten Light, Thirty Cases of Major Zeman, and Feuer frei!