Robert McMillan

Robert McMillan may refer to:
 * Robert S. McMillan (architect) (1916–2001), architect and co-founder of The Architects Collaborative
 * Robert S. McMillan (astronomer), astronomer at the University of Arizona
 * Robert McMillan (Australian judge) (1858–1931), Chief Justice of the Supreme Court of Western Australia
 * Robert Johnston McMillan (1885–1941), U.S. federal judge
 * Robert Thomas McMillan (1887–1962), member of the New Zealand Legislative Council
 * Robert McMillan (footballer) (1857–1928), Welsh footballer
 * Robert MacMillan (1865–1936), Scottish national rugby union player
 * Bob MacMillan (born 1952), Canadian hockey player and politician