Nicholas Adontz (Armenian: ????????? ?????, Nikogayos Adonc’, also spelled Adonts; Russian: ??????? ?????; January 10, 1871 – January 27, 1942) was an Armenian historian, specialist of Byzantine and Armenian studies, and philologist.
Adontz was the author of Armenia in the Period of Justinian, a highly influential work and landmark study on the social and political structures of early Medieval Armenia.