Oluf Hansen Hagen (11 May 1845 – 18 October 1903) was a Norwegian politician for the Liberal Party. He was elected to the Norwegian Parliament in 1898, representing the constituency of ''Trondhjem og Levanger''. He served one term, from 1898 to 1900.

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1845 births 1903 deaths Politicians from Trondheim Liberal Party (Norway) politicians Members of the Storting {{Norway-politician-1840s-stub