'''Maclagan''' or '''MacLagan''' may refer to:

== People == * Andrew Douglas Maclagan FRSE (1812–1900), Scottish physician * Bill Maclagan (1858–1926), Scotland and British Lions rugby union captain * Christian Maclagan (1811–1901), Scottish antiquarian and early archaeologist * Daniel MacLagan (1904-1991), zoologist and entomologist * David Maclagan (1785–1865), Scottish doctor * Diane Maclagan (born 1974), mathematician * Edward Douglas MacLagan (1864–1952), British administrator in India * Sir Eric Maclagan (1879–1951), British museum director * Gilchrist Maclagan (1879–1915), British rower, gold medallist in the 1908 Olympics * James MacLagan (1728–1805), collector of Scottish Gaelic poetry and song * Malcolm Maclagan (1907–1997), engineer and cricketer * Michael Maclagan (1914–2003), historian, antiquary and herald at Oxford * Miles Maclagan (born 1974), tennis coach * Myrtle Maclagan (1911–1993), English cricketer * Robert Maclagan (1820–1894), British Army officer * Thomas John MacLagan (1838–1903), Scottish pharmacologist * William Maclagan (1826–1910), Archbishop of York * Ewen Sinclair-MacLagan (1868–1948), British Army officer

== Places == * Maclagan, Queensland, a town in the Toowoomba Region, Australia ** North Maclagan, Queensland, a locality in the Toowoomba Region, Australia * Pechey-Maclagan Road, road in Queensland

==See also== *McLagan (disambiguation)

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