長州 may refer to:
(長州), a prefecture between the 7th and 8th centuries in modern Inner Mongolia (長州), a province between the 8th and 9th centuries in modern Vietnam Chōshū Domain, a feudal domain of Japan during the Edo period Nagato Province, abbreviated name was Chōshū (長州), province of Japan located in what is today Yamaguchi Prefecture
See also 長洲, similar characters referring to various places called Changzhou