Morgan Lewis (October 16, 1754 – April 7, 1844) was an American lawyer, politician and military commander. Of Welsh descent, he was the son of Francis Lewis, a signer of the Declaration of Independence. He graduated from Princeton (then the College of New Jersey) in 1773 and began to study law on the advice of his father. His studies were interrupted by military service during the American Revolutionary War. From September 1, 1776 to the end of the war he was a colonel and the Quartermaster General for the Northern Department. In 1779 he married Gertrude Livingston (1757–1833), the daughter of Robert R. Livingston.