John Horan

John Horan may refer to:


 * John Horan (rugby league), rugby league footballer of the 1930s and 1940s
 * John Horan (sports administrator) (born 1958), served as 39th president of the GAA between 2018 and 2021
 * John Horan (politician) (1908–1971), politician in the Legislative Assembly of Alberta
 * John J. Horan (1920–2011), American businessman, CEO and chairman of Merck & Co.
 * Johnny Horan (1932–1980), American basketball player