- Source: John McCoy
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