Donald Maclean or McLean may refer to:

• Donald Maclean, 1st Laird of Ardgour (fl. 1410)
• Donald Maclean, 1st Laird of Brolas (17th century)
• Donald Maclean, 3rd Laird of Brolas (c.1670–1725)
• Donald Maclean, 5th Laird of Torloisk (died 1748)

• Donald Maclean (1800–1874), British barrister and MP for Oxford
• Donald Maclean (British politician) (1864–1932), British Liberal politician
• Donald McLean (New Zealand politician) (1820–1877)
• Donald A. McLean (1907–1973), Canadian Senator from New Brunswick
• Donald H. McLean (1884–1975), US Congressman from New Jersey

• Donald McLean (footballer) (born 1934), Scottish footballer
• Donald McLean (fur trader) (1805–1864), also known as Samadlin, Scottish fur trader in Canada
• Donald MacLean (ice hockey) (born 1977), Canadian hockey player
• Donald Maclean (judge) (1877–1947), Canadian politician and judge
• Donald McLean (pastoralist) (1772–1850), pastoralist in South Australia
• Donald Maclean (principal) (1869–1943), Scottish school principal
• Donald McLean (sailor) (born 1955), Caymanian sailor
• Donald Maclean (spy) (1913–1983), British diplomat and Soviet spy

• Don Maclean (disambiguation)
• John Donald McLean (1820–1866) Treasurer of Queensland, Australia.
• Donald MacLean Kerr (born 1939), American civil servant