County facts · Population growth · October 23, 2026
Fastest Growing Counties in Florida, 2020 to 2025
Florida's fastest growing counties by percent and by people added, April 2020 to July 2025 Census estimates, with each official parcel map.
Looking for the fastest growing counties in Florida? From the Census Bureau's April 1, 2020 estimates base to its July 1, 2025 estimate, Florida went from about 21,538,207 to 23,462,518 residents, a change of +1,924,311 (+8.9%). The fastest growing county by percentage was St. Johns County (+26.7%), while Polk County added the most people (+149,748, +20.7%).
Each table links the county's Platbookmapper page and its official parcel viewer, so you can go from the growth numbers straight to the property lines.
Florida growth at a glance
- County: 67
- Statewide, April 2020 to July 2025: +1,924,311 residents (+8.9%); July 2024 to July 2025 alone: +196,680 (+0.8%)
- Grew: 63 of 67 · Lost residents: 4
- Fastest growing by percent: St. Johns County (+26.7%); most people added: Polk County (+149,748)
- Counties with more deaths than births over the period: 51 of 67
The 10 fastest growing Florida counties by percent
| # | County | Apr 2020 | Jul 2025 | Change | % change | Parcel viewer |
|---|---|---|---|---|---|---|
| 1 | St. Johns County | 273,426 | 346,328 | +72,902 | +26.7% | qPublic (Schneider Geospatial) |
| 2 | Osceola County | 388,647 | 481,718 | +93,071 | +23.9% | ArcGIS Experience Builder |
| 3 | Walton County | 75,305 | 93,288 | +17,983 | +23.9% | qPublic (Schneider Geospatial) |
| 4 | St. Lucie County | 329,226 | 402,449 | +73,223 | +22.2% | county web map |
| 5 | Hendry County | 39,623 | 48,276 | +8,653 | +21.8% | ArcGIS Experience Builder |
| 6 | Flagler County | 115,378 | 140,360 | +24,982 | +21.7% | qPublic (Schneider Geospatial) |
| 7 | Sumter County | 129,752 | 157,772 | +28,020 | +21.6% | county web map |
| 8 | Polk County | 725,042 | 874,790 | +149,748 | +20.7% | county web map |
| 9 | Pasco County | 561,909 | 674,516 | +112,607 | +20.0% | ArcGIS Experience Builder |
| 10 | Lake County | 383,959 | 456,068 | +72,109 | +18.8% | county web map |
These 10 added about 653,298 people combined. The median county changed by +8.1%.
The 10 counties that added the most people
| # | County | People added | % change | Jul 2025 | Parcel viewer |
|---|---|---|---|---|---|
| 1 | Polk County | +149,748 | +20.7% | 874,790 | county web map |
| 2 | Lee County | +114,780 | +15.1% | 875,607 | county web map |
| 3 | Hillsborough County | +114,342 | +7.8% | 1,574,115 | county web map |
| 4 | Pasco County | +112,607 | +20.0% | 674,516 | ArcGIS Experience Builder |
| 5 | Miami-Dade County | +100,267 | +3.7% | 2,802,029 | county web map |
| 6 | Orange County | +98,092 | +6.9% | 1,528,002 | county web map |
| 7 | Osceola County | +93,071 | +23.9% | 481,718 | ArcGIS Experience Builder |
| 8 | Palm Beach County | +83,535 | +5.6% | 1,575,726 | county web map |
| 9 | St. Lucie County | +73,223 | +22.2% | 402,449 | county web map |
| 10 | St. Johns County | +72,902 | +26.7% | 346,328 | qPublic (Schneider Geospatial) |
The top 10 account for about 52% of all the gains in the counties that grew.
Where the new residents came from
The Census Bureau splits each change into natural change (births minus deaths), net domestic migration (moves from other parts of the US) and net international migration. Totals for April 2020 to July 2025 in the five fastest growing counties:
| County | Births minus deaths | Net domestic moves | Net international moves | Total change |
|---|---|---|---|---|
| St. Johns County | −468 | +70,554 | +3,491 | +72,902 |
| Osceola County | +9,090 | +44,248 | +39,448 | +93,071 |
| Walton County | +342 | +16,332 | +1,387 | +17,983 |
| St. Lucie County | −3,127 | +66,288 | +9,881 | +73,223 |
| Hendry County | +1,089 | +4,185 | +3,274 | +8,653 |
In all 5, moves from elsewhere in the US were the biggest source of growth. The three parts do not add up exactly to the total because the Census Bureau also carries a small residual.
The last year alone: July 2024 to July 2025
- St. Johns County: +3.9% (+12,994)
- Walton County: +3.5% (+3,192)
- Hendry County: +3.5% (+1,635)
- Marion County: +3.4% (+14,665)
- Osceola County: +3.4% (+15,842)
4 of these 5 are also in the 2020–2025 top 10, so the growth is not a one-year blip.
Counties losing residents
4 of Florida's 67 counties had fewer residents in July 2025 than in April 2020. They are:
- Monroe County: −3.0% (−2,465, now about 80,406)
- Taylor County: −2.7% (−589, now about 21,210)
- Calhoun County: −2.6% (−352, now about 13,289)
- Pinellas County: −1.1% (−10,527, now about 948,563)
What fast growth means on a parcel map
- New lots show up as plats first. When land is subdivided, the plat is recorded with the county and the parcel layer catches up on its own schedule, so a brand-new lot may not appear on the map for a while. Check the recorder's recent plats if a parcel looks missing.
- Parcel numbers change after splits. A tract that was one parcel last year can be several today. Search by owner name or address as well as by an old parcel number.
- City limits move. Growing cities annex land, which changes who handles zoning and permits even though the county still keeps the deed and the tax map.
- Percent is not the same as people. A small county can post a big percentage on a modest number of new residents, so read the people-added column too.
Related guides
- Largest counties in Florida
- Florida county GIS websites by viewer
- Florida plat maps
- Florida landowner maps for hunting
- Fastest growing counties in the US
- US counties losing population
More: All Florida counties on Platbookmapper
Sources
- U.S. Census Bureau, Population Estimates Program, county totals, Vintage 2025 (April 1, 2020 estimates base and July 1, 2020–2025 estimates, with components of change). Percent change is from the April 1, 2020 estimates base to the July 1, 2025 estimate.
- Platbookmapper county GIS directory (live data file behind our county pages, pulled October 23, 2026) for each official parcel viewer.