Ancher Nelsen (October 11, 1904 – November 30, 1992), was an American politician who served as the 34th Lieutenant Governor of the state of Minnesota and an eight-term congressman.
Nelsen was elected as a Republican to the U.S. House of Representatives in 1958 and served in the 86th through the 93rd Congresses, from January 3, 1959, to his resignation December 31, 1974, three days before his final term expired. He did not seek renomination in 1974.
He died in Hutchinson, Minnesota, November 30, 1992, at age 88.