Oscar Christian Gundersen (17 March 1908 – 21 February 1991) was a Norwegian politician for the Labour Party. During his student days he was a member of Mot Dag. Gundersen graduated with the cand.jur. degree in 1931. During Gerhardsen's Second Cabinet he was appointed Minister of Justice and the Police, a post he a year into the new Torp's Cabinet. He left in 1952 and became a Supreme Court Justice the next year. In 1958 he left that position to become Norwegian ambassador to the Soviet Union, a post he held until 1961.