Wyoming is the least populous state in the nation.
Wyoming [ waɪˈoʊmɪŋ ] is a state in the mountain region of the western United States . The state is the tenth largest by area , the least populous and the second least densely populated state in the country . The state population was estimated at 586,107 in 2015 , which is less than the population of 31 of the largest U.S. cities .