Allum is an English surname. Notable people with this name include:
Bert Allum (born 1930), English footballer
Bill Allum (1916–1992), Canadian ice hockey player and coach
Don Allum (1937–1992), English oarsman, the first person to row across the Atlantic Ocean in both directions
James Allum, Canadian politician
John Allum (1889–1972), New Zealand businessman and engineer, Mayor of Auckland City from 1941 to 1953