What are the fastest-growing counties in Alabama?
Limestone County is the fastest-growing county in Alabama: its population grew 3.36% a year from 2020 to 2025, to 122,928 residents (Census PEP Vintage 2025). Baldwin County (2.80%) and Madison County (2.11%) follow. Alabama as a whole grew 0.63% a year to 5,193,088 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 Alabama by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Limestone County | 122,928 | 3.36% | +17,175 | +885 | +$80.9M |
| 2 | Baldwin County | 267,761 | 2.80% | +32,909 | +3,232 | +$243.5M |
| 3 | Madison County | 433,516 | 2.11% | +33,903 | +6,325 | +$137.5M |
| 4 | Lee County | 189,881 | 1.66% | +7,758 | +4,559 | +$72.6M |
| 5 | Henry County | 18,394 | 1.38% | +1,545 | +87 | +$7.3M |
| 6 | St. Clair County | 98,206 | 1.38% | +7,227 | +136 | +$42.2M |
| 7 | Cullman County | 94,009 | 1.30% | +6,699 | +298 | +$40.0M |
| 8 | Shelby County | 238,552 | 1.28% | +9,527 | +2,858 | +$25.1M |
| 9 | Coffee County | 56,953 | 1.23% | +2,486 | +778 | +$2.4M |
| 10 | Cleburne County | 15,970 | 1.18% | +1,249 | +13 | +$2.1M |
Where are people moving in Alabama?
Madison County gained the most people from elsewhere in the United States: net domestic migration of +33,903 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Alabama 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 | Madison County | 433,516 | 2.11% | +33,903 | +6,325 | +$137.5M |
| 2 | Baldwin County | 267,761 | 2.80% | +32,909 | +3,232 | +$243.5M |
| 3 | Limestone County | 122,928 | 3.36% | +17,175 | +885 | +$80.9M |
| 4 | Shelby County | 238,552 | 1.28% | +9,527 | +2,858 | +$25.1M |
| 5 | Lee County | 189,881 | 1.66% | +7,758 | +4,559 | +$72.6M |
| 6 | St. Clair County | 98,206 | 1.38% | +7,227 | +136 | +$42.2M |
| 7 | Cullman County | 94,009 | 1.30% | +6,699 | +298 | +$40.0M |
| 8 | Lauderdale County | 97,135 | 0.65% | +4,508 | +384 | +$11.0M |
| 9 | Tuscaloosa County | 241,368 | 0.74% | +4,159 | +2,966 | -$42.0M |
| 10 | Elmore County | 91,577 | 0.83% | +3,820 | +260 | +$13.9M |
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 Limestone CountyFrequently asked questions
- What are the fastest-growing counties in Alabama?
- By population growth from 2020 to 2025, the fastest are Limestone County (3.36% a year), Baldwin County (2.80% a year), Madison County (2.11% a year), Lee County (1.66% a year) and Henry County (1.38% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Alabama?
- By net domestic migration from 2020 to 2025, the largest gains are Madison County (+33,903), Baldwin County (+32,909) and Limestone County (+17,175) (Census PEP Vintage 2025).
- How fast is Alabama growing overall?
- Alabama grew 0.63% a year from 2020 to 2025, to 5,193,088 residents, with net migration of +185,466 people (Census PEP Vintage 2025).
- Where does this Alabama 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 (5 of 67 in Alabama). 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.