Whitmarsh is a surname. Notable people with the name include: Louis Whitmarsh, appellant of South Dakota Supreme Court case State v. Whitmarsh regarding fellatio Martin Whitmarsh (born 1958), British businessman Megan Whitmarsh (born 1972), American artist Micah Whitmarsh, namesake of Col. Micah Whitmarsh House in Rhode Island, United States Mike Whitmarsh (1962–2009), American volleyball and basketball player Theodore Whitmarsh (1869–1936), American businessman and politician Tim Whitmarsh, British classicist Zach Whitmarsh (born 1977), Canadian track and field athlete