The center of population of Wyoming is located in Natrona County.
As of 2005, Wyoming had an estimated population of 509,293, which was an increase of 3,407, or 0.7%, from the prior year and an increase of 15,512, or 3.1%, since the 2000 census. This includes a natural increase since the last census of 12,165 people (that is 33,704 births minus 21,539 deaths) and an increase from net migration of 4,035 people into the state. Immigration from outside the United States resulted in a net increase of 2,264 people, and migration within the country produced a net increase of 1,771 people. In 2004, the foreign-born population was 11,000 (2.2%). In 2005, total births in Wyoming numbered 7,231 (Birth Rate of 14.04).
Wyoming is the least populous state of the United States (including the District of Columbia), and has the second lowest population density, behind Alaska.
The largest ancestry groups in Wyoming are: German (25.9%), English (15.9%), Irish (13.3%), American (6.5%), Norwegian (4.3%), and Swedish (3.5%).
The religious affiliations of the people of Wyoming are shown in the table below:
The largest denominations by number of adherents in 2000 were the Roman Catholic Church with 80,421; the Church of Jesus Christ of Latter-day Saints with 47,129; and the Southern Baptist Convention with 17,101.
In Wyoming, air travel occurs often. The largest airport in Wyoming is Jackson Hole Airport.Three interstate highways and nine U.S. highways pass through Wyoming. In addition, the state is served by the Wyoming state highway system.
Interstate 25 enters the state south of Cheyenne and runs north, intersecting Interstate 80 in Cheyenne. It passes through Casper and ends at Interstate 90 near Buffalo. Interstate 80 crosses the Utah border west of Evanston and runs east through the southern half of the state, passing through Cheyenne before entering Nebraska near Pine Bluffs. Interstate 90 comes into Wyoming near Parkman and cuts through the northern part of the state. It serves Gillette and enters South Dakota east of Sundance. In addition, Interstate 180 services Cheyenne, and not only is it the only three-digit interstate highway in the state, it is the only non-freeway in the country that is signed as an interstate.
The U.S. highways that pass through the state are U.S. Highways 14, 16, 18,20, 26, 30, 85, 87, 89, 189, 191, 212, and 287.
See also: List of Wyoming railroadsList of airports in Wyoming,andState highways in Wyoming