Millen may refer to:
Geography Millen, Georgia, a city Millen Township, Michigan Millen, West Virginia, an unincorporated community Millen (Belgium), a village in the municipality of Riemst Millen (Germany), a village in the municipality of Selfkant Millen Range, a mountain range in Antarctica
People Millen (surname) Millen Brand (1906–1980), American writer and poet Millen Matende (born 1982), Zimbabwean long-distance runner
Other uses Millen House, a historic house on the campus of Indiana University in Bloomington, Indiana, United States Millen High School, Millen, Georgia