McLachlan is a surname. It is derived from the Gaelic MacLachlainn. Notable people with the surname include:
Alexander McLachlan (1872–1956), Australian senator
Alexander McLachlan (poet) (1818–1896), Scottish-born Canadian poet
Angus McLachlan (born 1944), Australian pastoralist and former first-class cricketer
Craig McLachlan, Australian actor and singer
George McLachlan, Scottish footballer
Ian McLachlan, Australian landowner
James McLachlan (disambiguation)
Jimmy McLachlan, Scottish footballer
John McLachlan (disambiguation)
Kyle MacLachlan, American actor
Laurentia McLachlan
Michael A. McLachlan (born 1958), American politician
Mike McLachlan, American politician
Ryan McLachlan, fictional character
Sarah McLachlan, Canadian musician
Tiffany McLachlan, fictional character
Tom McLachlan, Australian rugby league footballer
Virginia McLachlan, Canadian Paralympic sprinter
William McLachlan (disambiguation)
