Ohlsen is a surname. Notable people with the surname include:

Anders Ohlsén (born 1964), Swedish canoeist Else Ahlmann-Ohlsen (1907–1994), Danish fencer Jürgen Ohlsen (1917–1994), German actor Nils Ohlsen (born 1967), German curator and essayist Russell Ohlsen (born 1955), Australian footballer

See also Ohlson