Adaev was an administrative division (uyezd) of the Kazakh Autonomous Socialist Soviet Republic,[1] corresponding in part to the Kazakh portion of the former Transcaspian Oblast, and to the present-day Mangystau Region of the Republic of Kazakhstan. In 1926, it comprised 27 volosts, with 174 villages, overwhelmingly Kazakh in ethnic composition.[2] The administrative capital of the province was Fort Alexandrovsk, on the Mangyshlak Peninsula.[1] In 1928 the territory of the republic was reorganized into 13 okrugs, of which Adaev was one; it was abolished in a further reorganization in 1929.[2]