John Cleves Symmes

For his nephew, who believed in a hollow Earth, see John Cleves Symmes, Jr.

John Cleves Symmes (July 21, 1742 – February 26, 1814) was a delegate to the Continental Congress from New Jersey, and later a pioneer in the Northwest Territory. He was also the father-in-law of President William Henry Harrison (and therefore the great-grandfather of President Benjamin Harrison).