Ludlum may refer to:
Ludlum Measurements, an American manufacturer of radiation detection and monitoring equipment
People David M. Ludlum (1910–1997), American historian, meteorologist, entrepreneur, and author Robert Ludlum (1927–2001), American author of 27 thriller novels Alia Moses (previously Alia Moses Ludlum; born 1962), District Judge of the United States District Court for the Western District of Texas