John Gilroy

• John Gilroy (artist), English artist/illustrator known for Guinness advertisements
• John Gilroy (baseball), baseball player
• John Gilroy (film editor), brother of Tony Gilroy
• John Gilroy (politician), Irish Labour Party Senator
• John Brodie Gilroy, English songwriter
• Johnny Gilroy, American football halfback
• John Gilroy (pioneer), 19th century Royal Navy sailor who was the namesake of the city of Gilroy, California