Langzhou or Lang Prefecture may refer to: Langzhou (郎州), a former prefecture in roughly modern Qujing, Yunnan, China Langzhou (郎州), a former prefecture in roughly modern Zunyi, Guizhou, China Langzhou (閬州), a former prefecture in roughly modern Langzhong, Sichuan, China Langzhou (朗州), a former prefecture in roughly modern Changde, Hunan, China