Wyoming
People per square mile, 1990:
People per square mile, 2000:
Historic & Projected Growth
1790 to 2030

| Year | Population | Year | Population | Year | Population | ||
| 1790 | 0 | 1880 | 20,789 | 1970 | 332,416 | ||
| 1800 | 0 | 1890 | 62,555 | 1980 | 469,557 | ||
| 1810 | 0 | 1900 | 92,531 | 1990 | 453,588 | ||
| 1820 | 0 | 1910 | 145,965 | 2000 | 493,782 | ||
| 1830 | 0 | 1920 | 194,402 | 2010 | 519,886 | ||
| 1840 | 0 | 1930 | 225,565 | 2020 | 530,948 | ||
| 1850 | 0 | 1940 | 250,742 | 2030 | 522,979 | ||
| 1860 | 0 | 1950 | 290,529 | ||||
| 1870 | 9,118 | 1960 | 330,066 |
Population By County
| Census 2000 Population | Change | Percent Change |
|
| WYOMING | 493,782 | 40,194 | 8.9 |
| Albany County | 32,014 | 1,217 | 4 |
| Big Horn County | 11,461 | 936 | 8.9 |
| Campbell County | 33,698 | 4,328 | 14.7 |
| Carbon County | 15,639 | -1,020 | -6.1 |
| Converse County | 12,052 | 924 | 8.3 |
| Crook County | 5,887 | 593 | 11.2 |
| Fremont County | 35,804 | 2,142 | 6.4 |
| Goshen County | 12,538 | 165 | 1.3 |
| Hot Springs County | 4,882 | 73 | 1.5 |
| Johnson County | 7,075 | 930 | 15.1 |
| Laramie County | 81,607 | 8,465 | 11.6 |
| Lincoln County | 14,573 | 1,948 | 15.4 |
| Natrona County | 66,533 | 5,307 | 8.7 |
| Niobrara County | 2,407 | -92 | -3.7 |
| Park County | 25,786 | 2,608 | 11.3 |
| Platte County | 8,807 | 662 | 8.1 |
| Sheridan County | 26,560 | 2,998 | 12.7 |
| Sublette County | 5,920 | 1,077 | 22.2 |
| Sweetwater County | 37,613 | -1,210 | -3.1 |
| Teton County | 18,251 | 7,079 | 63.4 |
| Uinta County | 19,742 | 1,037 | 5.5 |
| Washakie County | 8,289 | -99 | -1.2 |
| Weston County | 6,644 | 126 | 1.9 |
SOURCE: U.S. Bureau of the Census