Wyoming was a state in the United States of America. The majority of the state is dominated by the mountain ranges and range lands of the Rocky Mountain West, while the easternmost section of the state includes part of a high elevation prairie region known as the High Plains. While it was the tenth largest U.S. state by area, Wyoming was the 49th in population ahead of only Alaska) with a U.S. Census estimated population of 471,000 in 1980. The capital and the most populous city of Wyoming was Cheyenne.