McMullan is a Gaelic surname. Notable people with the surname include:
Bob McMullan, Australian politician Chelsea McMullan, Canadian documentary filmmaker David McMullan (b. 1901), Irish footballer (Liverpool FC) Hayes McMullan (1902–1986), American Delta blues singer, guitarist and songwriter Jackie McMullan, Provisional Irish Republican Army member James McMullan, Irish-Canadian illustrator Jim McMullan, actor Jimmy McMullan, Scottish soccer player John McMullan (1933–1994), American footballer John McMullan (cricketer) (1893–1967), New Zealand cricketer Lyle McMullan, editor and newspaper founder Kate McMullan (born 1947), American children's book author Kevin McMullan, acoustic guitarist Patrick McMullan, photographer Paul McMullan (footballer, born 1984), Scottish footballer (Heart of Midlothian FC) Paul McMullan (footballer, born 1996), Scottish footballer (Celtic FC) Paul McMullan (journalist) (born 1963), British journalist
See also McMullan Bros. Limited, Irish oil company