Odin Langen was born in Minneapolis, Minnesota. His family moved to Kennedy, Minnesota around 1914. He attended the public schools and Dunwoody Institute in Minneapolis from 1933 to 1934. He engaged in farming in Kittson County near Kennedy, Minnesota and was associated with Production Marketing Administration in Kittson County, Minnesota, 1935 – 1950. Langen was a member of the Kennedy (Minnesota) School Board and served as its president 1948 – 1950. Langen also served on the South Red River Town Board 1947 – 1950, and in the Minnesota House of Representatives 1950 – 1958.
Langen served as the Republican leader from 1957 to 1958 when he was elected as a Republican to the 86th, 87th, 88th, 89th, 90th, and 91st congresses, (January 3, 1959 – January 3, 1971). After being an unsuccessful candidate for reelection in 1970 to the 92nd congress, Langen became Administrator of the Packers and Stockyards Administration of the United States Department of Agriculture from January 1971 to April 1972, when he resigned to resume farming pursuits in Kennedy, Minnesota. 
He was married to Lillian Clauson (1911-1988) with whom he had three children. Odin Langen died in 1976. His funeral was held at the Red River Lutheran Church in Kennedy, Minnesota. 
- Onofrio, Jan (2000) Langen Odin Elsford Stanley in "Minnesota Biographical Dictionary: People of All Times and Places Who Have Been Important to the History and Life of the State' (Somerset Publishers, Inc., page 204) ISBN 9780403096749
- Langen, Odin Elsford Stanley (Minnesota Legislators Past and Present)
- "Our Campaigns". MN District 9 November 04, 1958. Retrieved January 1, 2016.
- "Our Campaigns". MN District 7 November 03, 1964. Retrieved January 1, 2016.
- "Odin Elsford Stanley Langen (1913-1976)". Politicians in Kittson County. Retrieved January 1, 2016.
- United States Congress. "Odin Langen (id: L000069)". Biographical Directory of the United States Congress.
|U.S. House of Representatives|
|U.S. Representative from Minnesota's 9th congressional district
1959 – 1963
Herman Carl Andersen
|U.S. Representative from Minnesota's 7th congressional district
1963 – 1971
John A. Hartle
|Minnesota House Minority Leader
1957 – 1959
Lloyd L. Duxbury