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Background • Federal Census Summary • State Map with County Boundaries • Counties • Links to State Resources Background
Although most of Wyoming was acquired as early as the Louisiana Purchase of 1803, organized government began with the establishment of Oregon, Nebraska, and Utah Territories (1848-54). Later the area was included in Idaho, Dakota, and Utah Territories until Wyoming Territory was established in 1868 with the present State boundaries. Wyoming was admitted as a State on July 10, 1890.
| Capital: Cheyenne | Total Area: 97,818 sq mi | ||
| Latitude: 41°N to 45°N | Longitude: 104°3'W to 111°3'W | ||
| Last Significant Boundary Change: 1870 | |||
In 1850 and 1860 present-day Wyoming had only limited census coverage, as part of Utah and Nebraska Territories. In 1870 census coverage included the whole of Wyoming Territory.
| 1790: --- | 1800: --- | 1810: --- | 1820: --- |
| 1830: --- | 1840: --- | 1850: --- | 1860: --- |
| 1870: 9,118 | 1880: 20,789 | 1890: 62,555 | 1900: 92,531 |
| 1910: 145,965 | 1920: 194,402 | 1930: 225,565 | 1940: 250,742 |
| 1950: 290,529 | 1960: 330,066 | 1970: 332,416 | 1980: 469,557 |
| 1990: 453,588 | 2000: 493,782 |
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Counties |
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Albany Big Horn Campbell Carbon Converse |
Crook Fremont Goshen Hot Springs Johnson |
Lincoln Natrona Niobrara Park Platte |
Sublette Sweetwater Teton Uinta Washakie Weston |