Louis Linden Madsen (September 29, 1907 – May 18, 1986) was an American agricultural scientist who served as president of Utah State University from 1950 to 1953 and later as a member of the Washington State University faculty.
Madsen succeeded Franklin S. Harris as president of Utah State.
Several papers co-authored by Madsen relating to diseases in cattle were published in the Journal of Animal Science.
Madsen's removal as president of Utah State lead to protests by the students.
Among his children was John M. Madsen, who was a general authority of the Church of Jesus Christ of Latter-day Saints.