McLay is a surname.
Notable people with the surname include:
Alma Soller McLay (1919–2017) Cameron McLay, American police chief Charles McLay (c. 1860–1918), Australian architect Colin McLay (1942–2022), New Zealand marine biologist Daniel McLay (born 1992), British cyclist David McLay (born 1898), Scottish footballer George McLay (1889–1917), Scottish footballer Greg McLay (born 1969), Australian cricketer Jim McLay (born 1945), New Zealand politician Laurie McLay, New Zealand autism researcher Nathan McLay, founder of Australian independent record label and management company Future Classic
See also McClay McLay Glacier, a glacier in Antarctica Maclay (disambiguation) Sky Macklay, American musician