Stráž pod Ralskem, until 1946 Vartenberk (German: Wartenberg (am Rollberg)) is a town in Česká Lípa District in the Liberec Region of the Czech Republic. It has a population of about 4,000.
Stráž pod Ralskem is known for its jailhouse.
Heinrich Ignaz Franz Biber (1644–1704), Czech-Austrian baroque composer
Daniel Joseph Mayer von Mayern (1656–1733), Bishop of Prague
František Baugut (1668–1726), sculptor
Anton von Jaksch (1810–1887), Czech-Austrian physician, rector of Charles University
Rudolf Bitzan (1872–1938), architect