Haagensen or Hågensen is a Norwegian surname. Notable people with the surname include:
Jonathan Haagensen (born 1983), Brazilian actor and model Karl Haagensen (1871–1918), Norwegian gymnast Nils-Øivind Haagensen (born 1971), Norwegian journalist and poet Phellipe Haagensen (born 1984), Brazilian actor Svein Haagensen (born 1939), Norwegian ice hockey player Yngve Hågensen (1938–2023), Norwegian trade unionist and writer