Ross Gilmore Marvin (January 28, 1880 – after December 8, 1908; reported as April 10, 1909) was an American explorer who took part in Robert Peary's 1905–1906 and 1908–1909 expeditions to the Arctic. It was initially believed that Marvin drowned during the second expedition, but an Inuit member of the expedition later stated he shot and killed Marvin.