Gullen may refer to:
People with the surname:
James Gullen (born 1989), English racing cyclist
Tore Gullen (born 1949), Norwegian cross-country skier Augusta Stowe-Gullen (1857–1943), Canadian physician and suffragette Fethullah Gülen (also spelled Gullen), Turkish religious and political figure
Other uses: Gullen, an administrative district of Ravensburg, Baden-Württemberg, Germany
See also Gulen Gollan, a surname Gullane, a town in Scotland