John Gilroy

John Gilroy may refer to:

• John Gilroy (artist) (1898–1985), English artist/illustrator known for Guinness advertisements
• John Gilroy (baseball) (1869–1897), baseball player
• John Gilroy, 19th century Royal Navy sailor who was the namesake of the city of Gilroy, California
• John Gilroy (film editor), brother of Tony Gilroy
• John Gilroy (politician), Irish Labour Party Senator