John Cornwall
John Cornwall is the name of:
- John Cornwall (died 1414), MP for Shropshire
- John Cornwall, 1st Baron Fanhope (died 1443), English nobleman, soldier and one of the most respected chivalric figures of his era
- John Cornwall (died 1608), MP for Marlborough (UK Parliament constituency)
- John Cornwall (Upper Canada politician), farmer and political figure in Upper Canada
- John Cornwall (South Australian politician) (1935–2018), former member of the South Australian Legislative Council
See also
- John of Cornwall (disambiguation), multiple people
- John Cornwell (disambiguation), multiple people