Valentyn Yakovych Moroz (Ukrainian: Валенти́н Я́кович Моро́з; 15 April 1936 – 16 April 2019) was a Ukrainian writer and political prisoner. His resistance to persecution by the communist authorities made him a popular hero, particularly with the Ukrainian diaspora in Canada, but after he was expelled from the USSR, his militant nationalism, and his private life, made him a controversial figure.