Jeju Province is one of the nine provinces of South Korea. The province is situated on and coterminous with the nation's largest island of Jeju , formerly transliterated as Cheju, Cheju Do, etc., or known as Quelpart to Europeans. The island lies in the Korea Strait, southwest of South Jeolla Province, of which it was a part before it became a separate province in 1946. Its capital is Jeju City.