Doolin is a surname. Notable people with the surname include:
Bill Doolin (1858–1896), American outlaw Charles Elmer Doolin, potato chips business founder James Doolin (1932–2002), American painter Lena Doolin Mason (1864–1924), American Methodist preacher and poet Mickey Doolin (1880–1951), American baseball player Paul Doolin (born 1963), Irish footballer William Doolin, American politician