Ilkka Kalevi Nummisto (24 April 1944 – 29 June 2019) was a Finnish sprint canoer. He competed at four Summer Olympics (1964, 1968, 1972 and 1976). His best Olympic finish was fifth in the K-4 1000 m event in Mexico City, 1968. After his Olympic career finished, he appeared in the finals of the World's Strongest Man competition five times between 1986 and 1992.