Ingomar Grünauer (born 11 August 1938 in Melk) is a contemporary Austrian composer.
The focus of his work is on pieces in smaller forms for music theatre.
His opera Cantor - Die Vermessung des Unendlichen, which deals with the existential conflicts in the life of the revolutionary mathematician Georg Cantor (1845-1918), was premiered on 10 November 2006 at the Halle Opera House under the direction of Roger Epple.