Ancher Nelsen (October 11, 1904 – November 30, 1992), was an American politician who served as the 34th Lieutenant Governor of Minnesota and an eight-term congressman.

Nelsen was born October 11, 1904, near Buffalo Lake, Minnesota, to Danish parents.

In 1924 he began operation of his 280-acre diversified farm at Hutchinson, McLeod County, Minnesota.

Nelsen was a member of the Minnesota Senate from 1935 to 1951, and a delegate to the 1948 and 1952 Republican National Conventions.

[3] 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.