Robert Milligan

Robert Milligan may refer to:
 * Robert Milligan (merchant) (1746–1809), Scottish slaver and merchant
 * Robert Milligan (politician) (1786–1862), British Liberal MP
 * Robert Milligan (footballer) (1892–1915), Scottish footballer
 * Robert F. Milligan (born 1932), United States Marine Corps general
 * Robert Milligan (rower) (born 1952), British rower