Seyyan Oskay (born 1913, İstanbul - died 16 May 1989, İstanbul) was a Turkish tango singer. In the Ottoman Empire the public appearance of Muslim Turkish women was unthinkable. Actresses and singers were invariably Jewish, Armenian, Greek or Levantines; on no account would they be Muslim. This only began to change after Atatürk instigated his revolution separating religion and state. The very first Turkish woman who, because of these new circumstances, dared to appear on a stage was a Tango singer called Seyyan Hanim.