is a state in the mountain region of the western United States.
It is the tenth largest state by area, the least populous state and the second least densely populated state in the country.
The Snowy Range in the south central part of the state is an extension of the Colorado Rockies in both geology and appearance.
The western two-thirds of the state is covered mostly with the mountain ranges and rangelands in the Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High Plains.
As specified in the designating legislation for the Territory of Wyoming, Wyoming's borders are lines of latitude, 41°N and 45°N, and longitude, 104°3'W and 111°3'W (27° W and 34° W of the Washington Meridian), making the shape of the state a latitude-longitude quadrangle.
Wyoming is one of only three states (along with Colorado and Utah) to have borders along only straight latitudinal and longitudinal lines, rather than being defined by natural landmarks.
Due to surveying inaccuracies during the 19th century, Wyoming's legal border deviates from the true latitude and longitude lines by up to half of a mile (0.8 km) in some spots, especially in the mountainous region along the 45th parallel.
It is the tenth largest state in the United States in total area, containing 97,814 square miles (253,340 km and from the east to the west border is 365 miles (587 km) at its south end and 342 miles (550 km) at the north end.
Wyoming is bordered on the north by Montana, on the east by South Dakota and Nebraska, on the south by Colorado, on the southwest by Utah, and on the west by Idaho.
Cheyenne is the capital and the most populous city in Wyoming, with a population estimate of 63,335 in 2015.
The state is a great plateau broken by many mountain ranges.
Surface elevations range from the summit of Gannett Peak in the Wind River Mountain Range, at 13,804 feet (4,207 m), to the Belle Fourche River valley in the state's northeast corner, at 3,125 feet (952 m).
In the northwest are the Absaroka, Owl Creek, Gros Ventre, Wind River and the Teton ranges.In the north central are the Big Horn Mountains; in the northeast, the Black Hills; and in the southern region the Laramie, Snowy and Sierra Madre ranges.