Louis J. O'Marr (1882 – June 27, 1966) was an American politician who served as the 13th attorney general of Wyoming.
He served as the city attorney of Sheridan for two terms and on the Wyoming Board of Law Examiners for twenty years.
[2][1][5] On November 30, 1942, Governor-elect Lester C. Hunt announced that he would appoint O'Marr as Attorney General of Wyoming, Hunt appointed him on January 4, 1943, as his first act as governor, and O'Marr was approved by unanimity by the Wyoming Senate on January 22.
[9] On March 12, 1947, President Harry S. Truman appointed O'Marr as an associate member of the Indian Claims Commission, which was confirmed by the Senate on April 9.
[10] On August 1, 1959, he resigned from the Indian Claims Commission and President Dwight D. Eisenhower selected former Senator Arthur Vivian Watkins to replace O'Marr.