Kalevi Aho (born 9 March 1949 in Forssa, Finland) is a Finnish composer.
He studied composition at the Sibelius Academy under Einojuhani Rautavaara, receiving a diploma in 1971. He continued his studies for a year in Berlin with Boris Blacher. His teaching positions include music theory at the University of Helsinki from 1974 to 1988, and a professorship at the Sibelius Academy from 1988 to 1993. Aho has worked as a freelance composer, with a state scholarship, since 1993. He lives in Helsinki.