| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| St. Johns County | 1 | 25.71% | 348,346 | 277,105 |
| Osceola County | 2 | 24.98% | 488,873 | 391,163 |
| Walton County | 3 | 22.54% | 92,994 | 75,891 |
| St. Lucie County | 4 | 22.23% | 405,154 | 331,461 |
| Flagler County | 5 | 22.03% | 141,596 | 116,032 |
| Hendry County | 6 | 21.21% | 48,149 | 39,723 |
| Polk County | 7 | 20.74% | 881,584 | 730,179 |
| Sumter County | 8 | 20.66% | 157,229 | 130,303 |
| Pasco County | 9 | 20.49% | 682,179 | 566,182 |
| Lake County | 10 | 19.52% | 461,626 | 386,238 |
| Bay County | 11 | 18.6% | 207,014 | 174,543 |
| Marion County | 12 | 18.02% | 445,472 | 377,464 |
| Nassau County | 13 | 17.73% | 107,173 | 91,036 |
| Manatee County | 14 | 17.58% | 472,247 | 401,644 |
| Gilchrist County | 15 | 15.91% | 20,731 | 17,885 |
| Charlotte County | 16 | 15.5% | 217,159 | 188,017 |
| Lee County | 17 | 14.65% | 877,692 | 765,566 |
| Hernando County | 18 | 13.93% | 222,885 | 195,629 |
| Levy County | 19 | 13.47% | 48,865 | 43,065 |
| Jefferson County | 20 | 13.14% | 16,295 | 14,402 |
| Suwannee County | 21 | 12.42% | 48,938 | 43,530 |
| Citrus County | 22 | 12.26% | 173,512 | 154,569 |
| Gulf County | 23 | 12.17% | 15,995 | 14,259 |
| Santa Rosa County | 24 | 12.02% | 211,737 | 189,022 |
| Collier County | 25 | 11.94% | 422,401 | 377,331 |
| Wakulla County | 26 | 11.37% | 37,758 | 33,903 |
| Glades County | 27 | 11.14% | 13,425 | 12,079 |
| Lafayette County | 28 | 10.43% | 9,088 | 8,230 |
| Volusia County | 29 | 10.29% | 612,922 | 555,752 |
| Sarasota County | 30 | 10.29% | 481,129 | 436,256 |
| Brevard County | 31 | 10.09% | 670,189 | 608,792 |
| Clay County | 32 | 9.97% | 240,786 | 218,956 |
| Highlands County | 33 | 9.93% | 111,405 | 101,340 |
| Hillsborough County | 34 | 9.49% | 1,605,539 | 1,466,320 |
| Orange County | 35 | 9.38% | 1,566,027 | 1,431,720 |
| DeSoto County | 36 | 9.17% | 37,214 | 34,089 |
| Hamilton County | 37 | 8.82% | 14,947 | 13,736 |
| Okeechobee County | 38 | 8.77% | 43,135 | 39,656 |
| Jackson County | 39 | 8.75% | 51,229 | 47,106 |
| Washington County | 40 | 8.48% | 27,461 | 25,314 |
| Indian River County | 41 | 8.31% | 173,791 | 160,452 |
| Dixie County | 42 | 7.92% | 18,007 | 16,685 |
| Miami-Dade County | 43 | 7.68% | 2,902,672 | 2,695,729 |
| Palm Beach County | 44 | 7.52% | 1,606,629 | 1,494,276 |
| Duval County | 45 | 7.38% | 1,071,485 | 997,826 |
| Baker County | 46 | 7.06% | 30,108 | 28,122 |
| Columbia County | 47 | 6.98% | 74,630 | 69,760 |
| Franklin County | 48 | 6.86% | 13,330 | 12,474 |
| Putnam County | 49 | 6.82% | 78,391 | 73,386 |
| Broward County | 50 | 6.62% | 2,072,158 | 1,943,497 |
| Seminole County | 51 | 6.04% | 499,956 | 471,472 |
| Martin County | 52 | 5.31% | 167,091 | 158,669 |
| Alachua County | 53 | 5.3% | 294,602 | 279,765 |
| Okaloosa County | 54 | 4.36% | 221,342 | 212,097 |
| Liberty County | 55 | 4.27% | 8,139 | 7,806 |
| Escambia County | 56 | 3.69% | 334,516 | 322,612 |
| Hardee County | 57 | 3.36% | 26,192 | 25,341 |
| Madison County | 58 | 3.18% | 18,406 | 17,838 |
| Leon County | 59 | 2.72% | 301,952 | 293,961 |
| Holmes County | 60 | 2.66% | 20,090 | 19,569 |
| Gadsden County | 61 | 1.83% | 44,202 | 43,408 |
| Taylor County | 62 | 0.8% | 21,920 | 21,746 |
| Pinellas County | 63 | 0.48% | 964,439 | 959,839 |
| Bradford County | 64 | 0.47% | 28,362 | 28,229 |
| Union County | 65 | 0.32% | 15,483 | 15,433 |
| Monroe County | 66 | -2.83% | 80,510 | 82,851 |
| Calhoun County | 67 | -4.71% | 13,059 | 13,704 |
Florida's counties show varied growth patterns from 2020 to 2025. St. Johns County leads with 25.71% annualized growth, followed by Osceola County (24.98%) and Walton County (22.54%). The largest counties are Miami-Dade County (2,902,672), Broward County (2,072,158), and Palm Beach County (1,606,629). Of the 67 counties in Florida, 65 are growing while just 2 have experienced population decline. Overall, counties averaged 10.39% annualized growth, with total population growing by 10.41% annually.
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