Ludlum may refer to:
- David M. Ludlum (1910–1997), American historian, meteorologist, Army Officer, entrepreneur and author
- George Ludlum Hartford (1864–1957), American businessperson
- Robert Ludlum (1927–2001), American author
- Robert Ludlum (Catholic martyr) (died 1588), British Roman Catholic martyr
- Mother Ludlum, the "White Witch of Waverley"