William Baxter Palmer Closson (October 13, 1848 - May 30, 1926) was an American artist.
As a young adult, he was educated at Thetford Academy before graduating and working as a clerk in a railroad office.
Soon, he moved to Boston, Massachusetts, and worked as an apprentice wood engraver with Samuel Smith Kilburn. He studied drawing at the Lowell Institute, then went on to work for Harper's Magazine and various publishing houses in Boston. While in Boston, he shared a studio with painter George Fuller.
Seventeen of his paintings are in the American Art collection at the Smithsonian Institution. He also has works on display at the Wadsworth Atheneum in Hartford and the Cleveland Museum of Art.