Liberec (German: Reichenberg) is a city in the Czech Republic. Located on the Lusatian Neisse and surrounded by the Jizera Mountains and Ještěd-Kozákov Ridge, it is the fifth-largest city in the Czech Republic.

Settled by German and Flemish migrants since the 14th century until their expulsion after World War II, Liberec was once home to a thriving textile industry and hence nicknamed the "Manchester of Bohemia". For many Czechs, Liberec is mostly associated with the city's dominant Ještěd Tower. Since the end of the 19th century, the city has been a conurbation with the suburb of Vratislavice and the neighboring town of Jablonec nad Nisou. Therefore the total area with suburbs encompasses 150,000 inhabitants. This makes Liberec the third-largest city (with suburbs) in Bohemia after Prague and Pilsen.