Arlen is a given name. Notable people with the given name include:
Arlen Erdahl (born 1931), American politicianArlen Harris (born 1980), American football playerArlen Lancaster, chief of the United States Department of AgricultureArlen Ness (born 1939), American motorcycle designerArlen Roth (born 1952), American guitaristArlen Siu (1955–1975), Chinese-Nicaraguan writerArlen Specter (1930–2012), American politicianArlen Thompson, drummer of the indie rock group Wolf ParadeArlen Escarpeta (born 1981), Belizean actorArlen López (born 1993), Cuban boxer