Wyoming Counties by Population (2025)
2025 Pop.
10K
20K
30K
40K
50K
60K
70K
80K
90K
100K
Top 5 Most Populous Counties
102,487
80,852
48,381
41,258
39,952
23 Counties
| County | 2025 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Laramie County | 102,487 | 2.7K | 38 | 1.74% |
| Natrona County | 80,852 | 5.3K | 15 | 0.69% |
| Campbell County | 48,381 | 4.8K | 10 | 2.62% |
| Sweetwater County | 41,258 | 10.4K | 4 | -2.22% |
| Albany County | 39,952 | 4.3K | 9 | 7.64% |
| Fremont County | 39,642 | 9.2K | 4 | 1.15% |
| Sheridan County | 33,375 | 2.5K | 13 | 7.64% |
| Park County | 31,342 | 6.9K | 5 | 5.65% |
| Teton County | 23,176 | 4K | 6 | -0.89% |
| Lincoln County | 21,091 | 4.1K | 5 | 7.29% |
| Uinta County | 20,518 | 2.1K | 10 | 0.28% |
| Carbon County | 14,183 | 7.9K | 2 | -2.24% |
| Converse County | 13,682 | 4.3K | 3 | -0.49% |
| Goshen County | 12,608 | 2.2K | 6 | 0.73% |
| Big Horn County | 12,107 | 3.1K | 4 | 5.47% |
| Sublette County | 8,939 | 4.9K | 2 | 2.28% |
| Johnson County | 8,814 | 4.2K | 2 | 4.07% |
| Platte County | 8,443 | 2.1K | 4 | -2.19% |
| Crook County | 7,954 | 2.9K | 3 | 10.8% |
| Washakie County | 7,588 | 2.2K | 3 | -0.98% |
| Weston County | 6,904 | 2.4K | 3 | 1.28% |
| Hot Springs County | 4,598 | 2K | 2 | -0.48% |
| Niobrara County | 2,275 | 2.6K | 1 | -7.26% |
Overview of Wyoming Counties
There are 23 counties in Wyoming.
Laramie County is the largest county in the state, with a population of 102,487. 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 : 80,852
- Campbell County : 48,381
Wyoming Counties with the Fewest Residents
The smallest county in Wyoming is Niobrara County , with a population of just 2,275. This total represents a decrease of 0.1% since the last census count was performed.
Other small counties include:
- Hot Springs County : 4,598
- Weston County : 6,904
- Washakie County : 7,588
Wyoming Counties with Rapid Growth
Crook County , with its current population of 7,954, 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 2,275 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)