Harlan Francis Hagen (October 8, 1914 – November 25, 1990) was an American lawyer and World War II veteran who served as a United States representative from California.

He went on to graduate from Long Beach City College in 1933 and from the University of California, Berkeley with an A.B.

In 1952, Hagen was elected to the 83rd Congress as a Democrat, defeating Republican Congressman Thomas Werdel with 51% of the vote.

[4][5] Hagen was defeated for reelection in 1966 by the Republican candidate, Bob Mathias, by a margin of 55.9% to 44.1% in what was by then designated as the 18th District.

[2] He tried to win the seat back from Mathias in 1968 but was again defeated, receiving only 33.4% of the vote.