Gulen or Gülen may refer to:

• Fethullah Gülen (1941—2024), Turkish preacher, author, and Islamic opinion leader
• Levent Gülen (born 1994), Turkish-Swiss footballer
• Nur Mustafa Gülen (born 1960), Turkish footballer and coach

• Gulen (municipality), municipality in Vestland county, Norway
• Gulen Church, a church in Gulen municipality in Vestland county, Norway
• Gulen (fjord), a fjord in Bremanger municipality in Vestland county, Norway

• Gülen movement, an Islamic movement founded and led by Fethullah Gülen

• Gullen (disambiguation)