John Clay
John Clay may refer to:
- John Clay, English soldier
- John Clay , English prison chaplain
- John Clay , English cricketer
- John Clay , American football player
- John Clay , American football player
- John Cecil Clay, American illustrator
- John Granby Clay, British general
- John Morrison Clay, American horse breeder
- John P. Clay, investment banker and founder of the Clay Sanskrit Library
- John Randolph Clay, American diplomat
- Johnnie Clay, English cricketer
- The Red-Headed League, an 1891 short story by Arthur Conan Doyle with a character named John Clay