Arlen is a surname. Notable people with the surname include:
Harold Arlen (1905–1986), American musical composer Margaret Arlen, American talk show host Michael Arlen (1895–1956), Armenian novelist and short story writer Richard Arlen (1899–1976), American actor Walter Arlen (1920–2023), Austrian-born American composer
See also Arlen (given name) Arlen (disambiguation)