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