MacMillan, Macmillan, McMillen or McMillan may refer to:
People McMillan (surname) Clan MacMillan, a Highland Scottish clan
Places Australia Division of McMillan, electoral district in Australian House of Representatives in Victoria
Canada Macmillan River, a river in the Yukon Territory of northwestern Canada MacMillan Provincial Park, a provincial park in British Columbia, Canada
United States McMillan Mesa, a mesa in Flagstaff, Coconino County, Arizona. McMillan, Michigan McMillan Township, Luce County, Michigan McMillan Township, Ontonagon County, Michigan McMillan, Oklahoma, an unincorporated community McMillan, Texas, an unincorporated community McMillan, Wisconsin, a town McMillan (community), Wisconsin, an unincorporated community McMillan Reservoir in Washington, D.C.
Companies and organizations McMillan (agency), a Canadian creative agency Macmillan Cancer Support, a British charity McMillan Hotels, a hotel group McMillan LLP, a Canadian law firm McMillan Firearms Manufacturing McMillan TAC-50, a sniper rifle Macmillan Publishers, a multinational publishing group Macmillan Inc., a now mostly defunct American publishing company Macmillan of Canada, a Canadian publishing house. MacMillan Bloedel, a Canadian forestry company Macmillan Academy, an academy in Middlesbrough, North Yorkshire, England Palgrave Macmillan, a British academic and trade publishing company
Other uses MacMillan (crater) McMillan & Wife, a 1970s television series McMillan Plan, a 1901 development plan for Washington, D.C. Captain MacMillan, a character from the 2007 video game Call of Duty 4: Modern Warfare