Horace Chandler Davis (August 12, 1926 – September 24, 2022) was an American-Canadian mathematician, writer, educator, and political activist. He was born on August 12, 1926 in Ithaca, New York, to parents Horace B. Davis and Marian R. Davis. In 1948 he married Natalie Zemon Davis; they have three children. He was a member of the Communist Party USA and he was fired from the University of Michigan and jailed for his beliefs. He moved to Canada in 1962 and began teaching at the University of Toronto. A lecture in honour of his stand for his beliefs is now held at the university that fired him.