John McCoy may refer to: John McCoy (musician) (born c. 1950), British bass guitarist John McCoy (Irish politician) (born 1940), Irish Progressive Democrats politician 1987–1989 John B. McCoy (born 1943), CEO Banc One Corporation John Calvin McCoy (1811–1889), founder of Kansas City, Missouri John W. McCoy (1910–1989), American artist Jack McCoy (John James McCoy), fictional district attorney in the television drama Law & Order John McCoy (American politician) (born 1943), American Indian Washington State Senator John E. McCoy, United States National Guard general