Nikoghos Tahmizian (1926–2011, Armenian: Նիկողոս Թահմիզյան; also spelled: Nikogos Tahmizyan) was an Armenian musicologist, theorist and historian. His professional accomplishments were to decipher neumes (khaz) of Armenian church music, analyze the musical theory of old Armenia and research the life and works of Armenian composers from medieval times to modern era.