Robert B. Hansen (August 13, 1925 – December 25, 2005) was an American politician who served as the Attorney General of Utah from 1977 to 1981. Although born in Idaho, Hansen was raised in Merced, California. During World War II he joined the navy and studied at the University of New Mexico. He then went to the University of California, Hastings College of Law. He moved to Salt Lake City in 1950 where he began to practice law. He became assistant attorney general of Utah in 1969.