George Tsontakis (born October 24, 1951, Astoria, New York) is active both as composer and conductor.

He has been conductor of the Aspen Music Festival Contemporary Ensemble where he has been a teacher of composition since 1976.

His music is increasingly being performed and his commissions include quartets for the Emerson Quartet and the American String Quartet.

He wrote a violin concerto for Cho-Liang Lin and a percussion concerto for Evelyn Glennie.