Harry Morey Callahan (October 22, 1912 – March 15, 1999) was an American photographer and educator. He taught at both the Institute of Design in Chicago and the Rhode Island School of Design.
Callahan's first solo exhibition was at the Art Institute of Chicago in 1951. He had a retrospective at the Museum of Modern Art in New York in 1976/1977. Callahan was a recipient of the Edward MacDowell Medal and the National Medal of Arts. He represented the United States in the Venice Biennale in 1978.