What are the fastest-growing counties in Wyoming?
Lincoln County is the fastest-growing county in Wyoming: its population grew 1.51% a year from 2020 to 2025, to 21,180 residents (Census PEP Vintage 2025). Sheridan County (1.40%) and Park County (0.99%) follow. Wyoming as a whole grew 0.38% a year to 588,753 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in Wyoming by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Lincoln County | 21,180 | 1.51% | +1,201 | +105 | +$33.0M |
| 2 | Sheridan County | 33,241 | 1.40% | +2,322 | +137 | +$32.5M |
| 3 | Park County | 31,171 | 0.99% | +1,772 | +53 | +$37.3M |
| 4 | Big Horn County | 12,024 | 0.93% | +650 | +29 | +$3.8M |
| 5 | Albany County | 38,558 | 0.77% | +52 | +1,124 | -$2.5M |
| 6 | Laramie County | 102,938 | 0.44% | +1,875 | +76 | +$19.1M |
| 7 | Campbell County | 48,145 | 0.42% | -345 | +125 | -$15.9M |
| 8 | Uinta County | 20,728 | 0.26% | +93 | 0 | -$2.1M |
| 9 | Goshen County | 12,640 | 0.19% | +378 | +56 | +$1.1M |
| 10 | Fremont County | 39,464 | 0.14% | +913 | -17 | -$3.1M |
Where are people moving in Wyoming?
Sheridan County gained the most people from elsewhere in the United States: net domestic migration of +2,322 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Wyoming place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Sheridan County | 33,241 | 1.40% | +2,322 | +137 | +$32.5M |
| 2 | Laramie County | 102,938 | 0.44% | +1,875 | +76 | +$19.1M |
| 3 | Park County | 31,171 | 0.99% | +1,772 | +53 | +$37.3M |
| 4 | Lincoln County | 21,180 | 1.51% | +1,201 | +105 | +$33.0M |
| 5 | Fremont County | 39,464 | 0.14% | +913 | -17 | -$3.1M |
| 6 | Big Horn County | 12,024 | 0.93% | +650 | +29 | +$3.8M |
| 7 | Natrona County | 80,526 | 0.06% | +558 | -63 | +$0.1M |
| 8 | Goshen County | 12,640 | 0.19% | +378 | +56 | +$1.1M |
| 9 | Uinta County | 20,728 | 0.26% | +93 | 0 | -$2.1M |
| 10 | Albany County | 38,558 | 0.77% | +52 | +1,124 | -$2.5M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Lincoln CountyFrequently asked questions
- What are the fastest-growing counties in Wyoming?
- By population growth from 2020 to 2025, the fastest are Lincoln County (1.51% a year), Sheridan County (1.40% a year), Park County (0.99% a year), Big Horn County (0.93% a year) and Albany County (0.77% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Wyoming?
- By net domestic migration from 2020 to 2025, the largest gains are Sheridan County (+2,322), Laramie County (+1,875) and Park County (+1,772) (Census PEP Vintage 2025).
- How fast is Wyoming growing overall?
- Wyoming grew 0.38% a year from 2020 to 2025, to 588,753 residents, with net migration of +10,906 people (Census PEP Vintage 2025).
- Where does this Wyoming data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked (8 of 23 in Wyoming). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.