Christian August Selmer (1816–1889) was a Norwegian politician who served as a member of the Norwegian parliament, minister of defense, minister of justice, and prime minister. As the second prime minister

Selmer's record as prime minister was characterized by the conflict over whether members of cabinet were required to appear in parliament to answer questions. He influenced King Oscar II to reject efforts at a compromise, setting the stage for impeachment proceedings in the 1883 to 1884. Selmer and several of his cabinet members were convicted and removed from office.

It was subsequently found that Selmer had conspired with the king to overrule the impeachment results, institute unlimited veto rights for the king, and use force against any resulting insurrection.