Hart, John (1711?โ€“1779), an American patriot and signer of the Declaration of Independence. Hart was born in Stonington, Connecticut, but grew up in New Jersey. He became a wealthy farmer and businessman. Hart served in the New Jersey colonial assembly, 1761โ€“71, and the Continental Congress in 1776. He was speaker of the first New Jersey state assembly, 1776โ€“78.