| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| St. Johns County | 1 | 30.55% | 361,764 | 277,105 |
| Osceola County | 2 | 30.3% | 509,688 | 391,163 |
| Walton County | 3 | 26.92% | 96,322 | 75,891 |
| St. Lucie County | 4 | 26.6% | 419,638 | 331,461 |
| Hendry County | 5 | 26.29% | 50,168 | 39,723 |
| Flagler County | 6 | 26.21% | 146,448 | 116,032 |
| Polk County | 7 | 24.67% | 910,290 | 730,179 |
| Pasco County | 8 | 24.56% | 705,244 | 566,182 |
| Lake County | 9 | 24.03% | 479,048 | 386,238 |
| Bay County | 10 | 22.78% | 214,310 | 174,543 |
| Sumter County | 11 | 22.61% | 159,765 | 130,303 |
| Marion County | 12 | 22.41% | 462,039 | 377,464 |
| Manatee County | 13 | 21.04% | 486,142 | 401,644 |
| Nassau County | 14 | 20.8% | 109,970 | 91,036 |
| Gilchrist County | 15 | 18.7% | 21,229 | 17,885 |
| Charlotte County | 16 | 18.18% | 222,196 | 188,017 |
| Lee County | 17 | 16.83% | 894,425 | 765,566 |
| Hernando County | 18 | 16.35% | 227,620 | 195,629 |
| Levy County | 19 | 16.02% | 49,965 | 43,065 |
| Lafayette County | 20 | 15.87% | 9,536 | 8,230 |
| Jefferson County | 21 | 15.74% | 16,669 | 14,402 |
| Suwannee County | 22 | 15.64% | 50,340 | 43,530 |
| Citrus County | 23 | 14.41% | 176,850 | 154,569 |
| Santa Rosa County | 24 | 14.18% | 215,821 | 189,022 |
| Collier County | 25 | 13.58% | 428,569 | 377,331 |
| Glades County | 26 | 13.57% | 13,718 | 12,079 |
| Hamilton County | 27 | 13.28% | 15,560 | 13,736 |
| Wakulla County | 28 | 13.27% | 38,401 | 33,903 |
| Gulf County | 29 | 13.01% | 16,114 | 14,259 |
| Washington County | 30 | 12.27% | 28,419 | 25,314 |
| Volusia County | 31 | 12.11% | 623,072 | 555,752 |
| Brevard County | 32 | 12.01% | 681,931 | 608,792 |
| Clay County | 33 | 11.81% | 244,812 | 218,956 |
| Orange County | 34 | 11.64% | 1,598,408 | 1,431,720 |
| Highlands County | 35 | 11.54% | 113,032 | 101,340 |
| Jackson County | 36 | 11.4% | 52,478 | 47,106 |
| Sarasota County | 37 | 11.32% | 485,654 | 436,256 |
| Hillsborough County | 38 | 11.14% | 1,629,652 | 1,466,320 |
| Okeechobee County | 39 | 10.7% | 43,901 | 39,656 |
| DeSoto County | 40 | 10.55% | 37,684 | 34,089 |
| Dixie County | 41 | 10.28% | 18,400 | 16,685 |
| Miami-Dade County | 42 | 10.06% | 2,966,883 | 2,695,729 |
| Baker County | 43 | 9.85% | 30,891 | 28,122 |
| Franklin County | 44 | 9.68% | 13,681 | 12,474 |
| Indian River County | 45 | 9.34% | 175,443 | 160,452 |
| Palm Beach County | 46 | 9.16% | 1,631,203 | 1,494,276 |
| Duval County | 47 | 9.02% | 1,087,811 | 997,826 |
| Broward County | 48 | 8.4% | 2,106,844 | 1,943,497 |
| Putnam County | 49 | 8.31% | 79,481 | 73,386 |
| Columbia County | 50 | 7.92% | 75,283 | 69,760 |
| Seminole County | 51 | 7.18% | 505,307 | 471,472 |
| Liberty County | 52 | 6.62% | 8,323 | 7,806 |
| Alachua County | 53 | 6.31% | 297,422 | 279,765 |
| Martin County | 54 | 6.21% | 168,516 | 158,669 |
| Okaloosa County | 55 | 4.76% | 222,201 | 212,097 |
| Escambia County | 56 | 4.69% | 337,757 | 322,612 |
| Hardee County | 57 | 3.85% | 26,316 | 25,341 |
| Holmes County | 58 | 3.76% | 20,304 | 19,569 |
| Madison County | 59 | 3.42% | 18,448 | 17,838 |
| Leon County | 60 | 3.22% | 303,416 | 293,961 |
| Gadsden County | 61 | 1.95% | 44,253 | 43,408 |
| Bradford County | 62 | 1.49% | 28,649 | 28,229 |
| Taylor County | 63 | 1.15% | 21,997 | 21,746 |
| Pinellas County | 64 | 0.33% | 963,008 | 959,839 |
| Union County | 65 | -1.33% | 15,228 | 15,433 |
| Monroe County | 66 | -3.31% | 80,112 | 82,851 |
| Calhoun County | 67 | -6.3% | 12,840 | 13,704 |
Florida's counties show varied growth patterns from 2020 to 2026. St. Johns County leads with 4.54% annualized growth, followed by Osceola County (4.51%) and Walton County (4.05%). The largest counties are Miami-Dade County (2,966,883), Broward County (2,106,844), and Palm Beach County (1,631,203). Of the 67 counties in Florida, 64 are growing while just 3 have experienced population decline. Overall, counties averaged 1.95% annualized growth, with total population growing by 1.99% annually.
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