Wyoming Counties by Population (2026)
2026 Pop.
10K
20K
30K
40K
50K
60K
70K
80K
90K
100K
Top 5 Most Populous Counties
103,191
81,294
48,816
41,243
40,616
23 Counties
| County | 2026 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Laramie County | 103,191 | 2.7K | 38 | 2.44% |
| Natrona County | 81,294 | 5.3K | 15 | 1.24% |
| Campbell County | 48,816 | 4.8K | 10 | 3.54% |
| Sweetwater County | 41,243 | 10.4K | 4 | -2.26% |
| Albany County | 40,616 | 4.3K | 10 | 9.43% |
| Fremont County | 39,563 | 9.2K | 4 | 0.95% |
| Sheridan County | 33,772 | 2.5K | 13 | 8.92% |
| Park County | 31,602 | 6.9K | 5 | 6.53% |
| Teton County | 23,080 | 4K | 6 | -1.3% |
| Lincoln County | 21,182 | 4.1K | 5 | 7.75% |
| Uinta County | 20,415 | 2.1K | 10 | -0.22% |
| Carbon County | 14,116 | 7.9K | 2 | -2.7% |
| Converse County | 13,598 | 4.3K | 3 | -1.11% |
| Goshen County | 12,581 | 2.2K | 6 | 0.51% |
| Big Horn County | 12,130 | 3.1K | 4 | 5.67% |
| Sublette County | 8,913 | 4.9K | 2 | 1.98% |
| Johnson County | 8,825 | 4.2K | 2 | 4.2% |
| Platte County | 8,374 | 2.1K | 4 | -2.99% |
| Crook County | 8,133 | 2.9K | 3 | 13.29% |
| Washakie County | 7,514 | 2.2K | 3 | -1.94% |
| Weston County | 6,942 | 2.4K | 3 | 1.83% |
| Hot Springs County | 4,571 | 2K | 2 | -1.06% |
| Niobrara County | 2,249 | 2.6K | 1 | -8.32% |
Overview of Wyoming Counties
There are 23 counties in Wyoming.
Laramie County is the largest county in the state, with a population of 103,191. The most recent census shows that its population has increased by 0.02% since the previous census.
A number of other Wyoming counties also boast relatively large populations for their state, though not able to match the density of Laramie County:
- Natrona County : 81,294
- Campbell County : 48,816
Wyoming Counties with the Fewest Residents
The smallest county in Wyoming is Niobrara County , with a population of just 2,249. This total represents a decrease of 0.1% since the last census count was performed.
Other small counties include:
- Hot Springs County : 4,571
- Weston County : 6,942
- Washakie County : 7,514
Wyoming Counties with Rapid Growth
Crook County , with its current population of 8,133, has shown the largest population growth, with an increase of 0.1% since the last census.
On the other hand, Niobrara County has had the largest decrease in population, with its 2,249 current residents totalling 0.1% less than the previous census.
Sources
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)