What are the fastest-growing counties in Florida?
St. Johns County is the fastest-growing county in Florida: its population grew 4.56% a year from 2020 to 2025, to 346,328 residents (Census PEP Vintage 2025). Osceola County (4.25%) and Walton County (4.21%) follow. Florida as a whole grew 1.68% a year to 23,462,518 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 Florida by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | St. Johns County | 346,328 | 4.56% | +66,401 | +3,489 | +$831.9M |
| 2 | Osceola County | 481,718 | 4.25% | +42,264 | +39,293 | +$290.6M |
| 3 | Walton County | 93,288 | 4.21% | +15,688 | +1,387 | +$377.7M |
| 4 | Hendry County | 48,276 | 3.98% | +4,125 | +3,270 | +$21.7M |
| 5 | St. Lucie County | 402,449 | 3.96% | +63,594 | +9,869 | +$557.2M |
| 6 | Sumter County | 157,772 | 3.90% | +36,929 | +594 | +$398.9M |
| 7 | Flagler County | 140,360 | 3.88% | +27,211 | +1,451 | +$316.3M |
| 8 | Polk County | 874,790 | 3.68% | +119,498 | +23,196 | +$588.4M |
| 9 | Pasco County | 674,516 | 3.56% | +107,118 | +10,384 | +$960.0M |
| 10 | Lake County | 456,068 | 3.38% | +68,258 | +8,559 | +$780.2M |
Where are people moving in Florida?
Polk County gained the most people from elsewhere in the United States: net domestic migration of +119,498 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Florida 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 | Polk County | 874,790 | 3.68% | +119,498 | +23,196 | +$588.4M |
| 2 | Pasco County | 674,516 | 3.56% | +107,118 | +10,384 | +$960.0M |
| 3 | Lee County | 875,607 | 2.72% | +77,769 | +38,454 | +$1.26B |
| 4 | Marion County | 442,660 | 3.24% | +71,208 | +7,568 | +$506.5M |
| 5 | Lake County | 456,068 | 3.38% | +68,258 | +8,559 | +$780.2M |
| 6 | St. Johns County | 346,328 | 4.56% | +66,401 | +3,489 | +$831.9M |
| 7 | St. Lucie County | 402,449 | 3.96% | +63,594 | +9,869 | +$557.2M |
| 8 | Brevard County | 663,982 | 1.75% | +63,108 | +8,533 | +$599.4M |
| 9 | Volusia County | 606,573 | 1.76% | +59,139 | +8,152 | +$548.9M |
| 10 | Manatee County | 468,200 | 3.12% | +58,961 | +13,248 | +$1.11B |
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 St. Johns CountyFrequently asked questions
- What are the fastest-growing counties in Florida?
- By population growth from 2020 to 2025, the fastest are St. Johns County (4.56% a year), Osceola County (4.25% a year), Walton County (4.21% a year), Hendry County (3.98% a year) and St. Lucie County (3.96% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Florida?
- By net domestic migration from 2020 to 2025, the largest gains are Polk County (+119,498), Pasco County (+107,118) and Lee County (+77,769) (Census PEP Vintage 2025).
- How fast is Florida growing overall?
- Florida grew 1.68% a year from 2020 to 2025, to 23,462,518 residents, with net migration of +1,959,175 people (Census PEP Vintage 2025).
- Where does this Florida 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 (2 of 67 in Florida). 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.