Wyoming Counties by Population (2025)
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Top 5 Most Populous Counties
23 Counties
| County | 2025 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Laramie County | 101,390 | 2.7K | 38 | 0.66% |
| Natrona County | 80,777 | 5.3K | 15 | 0.6% |
| Campbell County | 48,376 | 4.8K | 10 | 2.61% |
| Sweetwater County | 40,999 | 10.4K | 4 | -2.84% |
| Fremont County | 40,313 | 9.2K | 4 | 2.83% |
| Albany County | 38,415 | 4.3K | 9 | 3.51% |
| Sheridan County | 33,487 | 2.5K | 13 | 8.02% |
| Park County | 31,195 | 6.9K | 4 | 5.14% |
| Teton County | 23,102 | 4K | 6 | -1.18% |
| Lincoln County | 21,298 | 4.1K | 5 | 8.34% |
| Uinta County | 20,781 | 2.1K | 10 | 1.58% |
| Carbon County | 13,926 | 7.9K | 2 | -4.02% |
| Converse County | 13,897 | 4.3K | 3 | 1.1% |
| Goshen County | 12,654 | 2.2K | 6 | 1.11% |
| Big Horn County | 12,296 | 3.1K | 4 | 7.07% |
| Sublette County | 9,403 | 4.9K | 2 | 7.64% |
| Johnson County | 8,839 | 4.2K | 2 | 4.39% |
| Platte County | 8,334 | 2.1K | 4 | -3.44% |
| Crook County | 7,938 | 2.9K | 3 | 10.59% |
| Washakie County | 7,682 | 2.2K | 3 | 0.33% |
| Weston County | 6,708 | 2.4K | 3 | -1.58% |
| Hot Springs County | 4,737 | 2K | 2 | 2.51% |
| Niobrara County | 2,366 | 2.6K | 1 | -3.59% |
Overview of Wyoming Counties
There are 23 counties in Wyoming.
Laramie County is the largest county in the state, with a population of 101,390. The most recent census shows that its population has increased by 0.01% 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 : 80,777
- Campbell County : 48,376
Wyoming Counties with the Fewest Residents
The smallest county in Wyoming is Niobrara County , with a population of just 2,366. This total represents a decrease of 0.0% since the last census count was performed.
Other small counties include:
- Hot Springs County : 4,737
- Weston County : 6,708
- Washakie County : 7,682
Wyoming Counties with Rapid Growth
Crook County , with its current population of 7,938, has shown the largest population growth, with an increase of 0.1% since the last census.
On the other hand, Carbon County has had the largest decrease in population, with its 13,926 current residents totalling 0.0% 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)