Horizon: A Review of Literature and Art was a literary magazine published in London, UK, between December 1939 and January 1950. Published every four weeks, it was edited by Cyril Connolly, who made it into a platform for a wide range of distinguished and emerging writers. It had a print run of 120 issues or 20 volumes.

Cyril Vernon Connolly CBE was an English literary critic and writer. He was the editor of the influential literary magazine Horizon (1940–49) and wrote Enemies of Promise (1938), which combined literary criticism with an autobiographical exploration of why he failed to become the successful author of fiction that he had aspired to be in his youth.