Lake McMillan in New Mexico

Harold Macmillan (1894–1986), a British Prime Minister

Edwin McMillan (1907–1991), an American chemist and Nobel Prize winner

Craig McMillan,New Zealand Cricketer

Donald B. MacMillan, an American explorer

Margaret MacMillan, Canadian historian

Clan MacMillan, a Highland Scottish clan.

McMillan Reservoir in Washington, DC

Kenneth MacMillan, Sir, British-born choreographer

James MacMillan (musician) (born 1959), a British composer

Macmillan Publishers, a multinational publishing group

Angus McMillan (1810–1865), an Australian explorer

Division of McMillan, an electoral district in the Australian House of Representatives in Victoria

Daniel Hunter McMillan (1846–1933), a Manitoba politician

James McMillan (Senator) (1838–1902), a U.S. politician from the state of Michigan

McMillan, Wisconsin, USA

Kirkpatrick MacMillan (1812–1878), British blacksmith who invented the rear-wheel-driven bicycle

Kate McMillan, a Canadian blogger

McMillan and Wife, a 1970s television series

Brian McMillan, South African Cricketer

Macmillan Cancer Support, a British charity

McMillan Plan, a 1901 development plan for Washington, D.C.

Colin R. McMillan (1935–2003), a former Assistant United States Secretary of Defense

Dave McMillan, a basketball coach

William MacMillan, a Canadian politician

Alexander Macmillan, (1818–1896), a British publisher

Margaret McMillan Nursery education pioneer

Robert S. McMillan (architect)

McMillan Township, Michigan, USA

Robert S. McMillan, an American astronomer

Joseph McMillan, a US vexillologist and heraldist

Stephen McMillan, a Scottish former footballer