John McCullough is the name of:
J. J. McCullough (John James McCullough), Canadian YouTuber John McCullough (actor) (1837–1885), American actor John McCullough (rugby union) (born 1936), New Zealand rugby football player John Alexander McCullough (1860–1947), New Zealand politician John G. McCullough (1835–1915), American politician and governor of Vermont John McCullough (basketball) (born 1956), American basketball player and coach John McCullough (poet) (born 1978), English poet John McCullough ( 1949–2019), English murder victim
See also John McCulloch (disambiguation)