McLagan is a surname. Notable people with the surname include:
Angus McLagan (1891–1956), New Zealand politician Ian McLagan (1945–2014), English musician Cole McLagan (born 1996), American soccer player Jennifer McLagan, Canadian chef and food writer John McLagan (1838–1901), Canadian newspaper publisher Kim McLagan (1948–2006), English model Peter McLagan (1823–1900), British politician Sara Anne McLagan (c. 1856–1924), Canadian newspaper publisher
See also Maclagan (disambiguation)