What are the fastest-growing counties in Tennessee?
Wilson County is the fastest-growing county in Tennessee: its population grew 3.32% a year from 2020 to 2025, to 175,033 residents (Census PEP Vintage 2025). Maury County (3.02%) and Loudon County (2.95%) follow. Tennessee as a whole grew 1.09% a year to 7,315,076 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 Tennessee by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Wilson County | 175,033 | 3.32% | +21,642 | +2,819 | +$157.8M |
| 2 | Maury County | 118,131 | 3.02% | +13,905 | +792 | +$87.2M |
| 3 | Loudon County | 63,764 | 2.95% | +8,860 | +813 | +$159.4M |
| 4 | Montgomery County | 249,935 | 2.46% | +16,486 | +2,347 | +$87.7M |
| 5 | Sequatchie County | 17,861 | 2.42% | +1,913 | +254 | +$18.5M |
| 6 | Rutherford County | 386,352 | 2.39% | +22,238 | +11,468 | +$117.5M |
| 7 | Meigs County | 14,186 | 2.06% | +1,778 | -1 | +$17.9M |
| 8 | Marshall County | 38,071 | 2.01% | +3,329 | +137 | +$30.6M |
| 9 | Robertson County | 80,175 | 1.90% | +6,252 | +770 | +$60.0M |
| 10 | Bedford County | 55,273 | 1.87% | +3,283 | +972 | +$24.6M |
Where are people moving in Tennessee?
Knox County gained the most people from elsewhere in the United States: net domestic migration of +23,843 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Tennessee 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 | Knox County | 511,453 | 1.26% | +23,843 | +7,517 | +$181.4M |
| 2 | Rutherford County | 386,352 | 2.39% | +22,238 | +11,468 | +$117.5M |
| 3 | Wilson County | 175,033 | 3.32% | +21,642 | +2,819 | +$157.8M |
| 4 | Montgomery County | 249,935 | 2.46% | +16,486 | +2,347 | +$87.7M |
| 5 | Williamson County | 272,061 | 1.74% | +15,904 | +3,879 | +$400.7M |
| 6 | Hamilton County | 390,833 | 1.22% | +15,485 | +5,869 | +$208.8M |
| 7 | Sumner County | 215,538 | 1.77% | +15,331 | +1,606 | +$193.9M |
| 8 | Maury County | 118,131 | 3.02% | +13,905 | +792 | +$87.2M |
| 9 | Blount County | 143,820 | 1.17% | +10,392 | +654 | +$57.3M |
| 10 | Sullivan County | 163,759 | 0.69% | +10,322 | +321 | +$67.8M |
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 Wilson CountyFrequently asked questions
- What are the fastest-growing counties in Tennessee?
- By population growth from 2020 to 2025, the fastest are Wilson County (3.32% a year), Maury County (3.02% a year), Loudon County (2.95% a year), Montgomery County (2.46% a year) and Sequatchie County (2.42% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Tennessee?
- By net domestic migration from 2020 to 2025, the largest gains are Knox County (+23,843), Rutherford County (+22,238) and Wilson County (+21,642) (Census PEP Vintage 2025).
- How fast is Tennessee growing overall?
- Tennessee grew 1.09% a year from 2020 to 2025, to 7,315,076 residents, with net migration of +393,332 people (Census PEP Vintage 2025).
- Where does this Tennessee 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 95 in Tennessee). 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.