John McCoy may refer to:
John McCoy (musician) (born 1950), British bass guitarist John McCoy (Irish politician) (born 1940), Irish Progressive Democrats politician 1987–1989 John B. McCoy (born 1943), American businessman John Calvin McCoy (1811–1889), American businessman and pioneer John W. McCoy (1910–1989), American artist John McCoy (American politician) (1943–2023), American Indian Washington State Senator John E. McCoy, United States National Guard general
Fictional characters
Jack McCoy (John James McCoy), fictional district attorney in the television drama Law & Order