Robert M. Smith

Robert M. Smith may refer to:
 * Robert MacKay Smith (1802–1888), Scottish businessman, meteorologist, and philanthropist
 * Robert Melville Smith (fl. 1931–1943), deputy minister of the Ontario Department of Highways
 * Robert Murdoch Smith (1835–1900), Scottish engineer, archaeologist and diplomat
 * Robert Murray Smith (1831–1921), Australian politician
 * Robert M. Smith, an inductee from the Canadian Mining Hall of Fame