Donald McMillan

Donald McMillan or MacMillan may refer to:
 * Donald McMillan (Ontario politician) (1835–1914), Senator from Ontario
 * Donald McMillan (Quebec politician) (1807–1876), who represented Vaudreuil in the 1st Canadian Parliament
 * Donald Baxter MacMillan (1874–1970), American explorer
 * Donald MacMillan (rugby union) (born 1930), rugby union player who represented Australia
 * Don MacMillan (1928-2004), Australian Olympic athlete