John Clay

John Clay may refer to:
 * John Clay (Wars of the Roses), English soldier
 * John Clay (chaplain) (1796–1858), English prison chaplain
 * John Clay (cricketer, born 1924) (1924–2011), English cricketer
 * John Clay (offensive tackle) (born 1964), American football player
 * John Clay (running back) (born 1988), American football player
 * John Cecil Clay (1875–1930), American illustrator
 * John Granby Clay (1766–1846), British general
 * John Morrison Clay (1821–1887), American horse breeder
 * John P. Clay (1934–2013), investment banker and founder of the Clay Sanskrit Library
 * John Randolph Clay (1808–1885), American diplomat
 * Johnnie Clay (1898–1973), English cricketer
 * The Red-Headed League, an 1891 short story by Arthur Conan Doyle with a character named John Clay