Gehlen may refer to:
In people:
- Adolph Ferdinand Gehlen (1775–1815), German chemist
- Reinhard Gehlen (1902–1979), German WW II general and first director, Bundesnachrichtendienst
- Arnold Gehlen (1904–1976), German philosopher
- Kurt von Gehlen (1927–1995), German professor
In geography:
- Biała Piska, Poland, formerly known as Gehlen