Peleg Wadsworth (May 6, 1748 – November 12, 1829) was an American officer during the American Revolutionary War and a Congressman from Massachusetts representing the District of Maine. He was also grandfather of noted American poet Henry Wadsworth Longfellow.Wadsworth was born in Duxbury, Massachusetts, to Peleg and Susanna (Sampson) Wadsworth. He graduated from Harvard College with an A.B. (1769) and an A.M.