William Samuel Johnson (1727-1819) was an American statesman and attorney from Connecticut. He graduated from Yale College in 1744 and went on to study law, receiving his A.M. from both Harvard University and Columbia University. He served as Judge of the Superior Court of Connecticut, was a member of the Constitutional Convention, and served as United States Senator from Connecticut from 1789 to 1791. He was elected President of Columbia College, formerly King's College, in 1787, a position that his father had held as well, and was a professor of rhetoric, logic, and belles-lettres. Johnson was also a vestryman of Trinity Church.