Mackail is a surname. Notable people with the surname include:
Craig Mackail-Smith (born 1984), British footballer Denis Mackail (1892–1971), English writer Hugh Mackail ( 1640–1666), Scottish martyr John William Mackail (1859–1945), Scottish man of letters
See also McKail, Western Australia, a suburb of Albany John McKail (1810–1871), an early settler of Western Australia