Flossenbürg (Northern Bavarian: Flossenbirch) is a municipality in the district of Neustadt an der Waldnaab in Bavaria in Germany.

The state-approved leisure area is located in the Bavarian Forest and borders Bohemia (the Czech Republic) in the east.

During World War II, the Flossenbürg concentration camp was located here.

Later, Flossenbürg belonged to the duchy of Neuburg-Sulzbach and came to the regional court of Floß in the Electorate of Bavaria in 1777.

Flossenbürg was the terminus of the Floß–Flossenbürg railway line that branched off in Floß from the Neustadt (Waldnaab)–Eslarn railway and is served today by a bus route from Weiden via Neustadt an der Waldnaab to the Silberhütte Cross-Country Skiing Centre.