Carl Ivar Hagen (born 6 May 1944) is a Norwegian politician and former Vice President of the Storting, the Norwegian parliament.
He was the leader of the Progress Party from 1978 to 2006, when he stepped down in favour of Siv Jensen.
Under his leadership, he was the undisputed leader and, in many ways, personally controlled its ideology and policies.
Hagen has since been regarded by both political scientists, and political colleagues and rivals alike as one of the greatest politicians in Norwegian history for his ability to build a hugely successful party up from scratch and his significant impact on Norwegian politics.
He has been described as the first postmodern politician in Norway.
While his ideology is classical liberalism with some conservatism, his political style has been described as right-wing populist.