Harry Crosby (June 4, 1898 – December 10, 1929) was an American heir, World War I veteran, "bon vivant", poet, and publisher who for some epitomized the Lost Generation in American literature. He was the son of one of the richest banking families in New England, a Boston Brahmin, and the nephew of Jane Norton Grew, the wife of financier J. P. Morgan, Jr.. As such, he was heir to a portion of a substantial family fortune. He was a volunteer in the American Field Service during World War I, and later served in the U.S. Ambulance Corps. He narrowly escaped with his life.