Thomas McKean was an American lawyer and politician from New Castle, in New Castle County, Delaware and Philadelphia. During the American Revolution he was a delegate to the Continental Congress, where he signed the United States Declaration of Independence and the Articles of Confederation. McKean served as a President of Congress. He was at various times a member of the Federalist and Democratic-Republican parties. McKean served as President of Delaware, Chief Justice of Pennsylvania, and Governor of Pennsylvania. He is also known for holding copious public positions.