| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| St. Johns County | 1 | 29.66% | 359,322 | 277,119 |
| Osceola County | 2 | 27.21% | 497,560 | 391,130 |
| Walton County | 3 | 27.12% | 96,480 | 75,899 |
| Hendry County | 4 | 25.64% | 49,911 | 39,726 |
| St. Lucie County | 5 | 24.7% | 413,306 | 331,453 |
| Flagler County | 6 | 24.48% | 144,436 | 116,031 |
| Sumter County | 7 | 23.78% | 161,283 | 130,293 |
| Polk County | 8 | 23.01% | 898,146 | 730,148 |
| Pasco County | 9 | 22.37% | 692,842 | 566,170 |
| Lake County | 10 | 21.35% | 468,682 | 386,221 |
| Marion County | 11 | 21.17% | 457,325 | 377,432 |
| Nassau County | 12 | 20.02% | 109,266 | 91,040 |
| Bay County | 13 | 19.63% | 208,816 | 174,551 |
| Manatee County | 14 | 18.88% | 477,444 | 401,622 |
| Charlotte County | 15 | 18.59% | 222,968 | 188,023 |
| Gilchrist County | 16 | 16.52% | 20,845 | 17,890 |
| Lee County | 17 | 16.19% | 889,547 | 765,575 |
| Hernando County | 18 | 15.45% | 225,830 | 195,610 |
| Wakulla County | 19 | 15.15% | 39,056 | 33,917 |
| Levy County | 20 | 14.7% | 49,396 | 43,065 |
| Santa Rosa County | 21 | 13.61% | 214,759 | 189,024 |
| Citrus County | 22 | 12.26% | 173,511 | 154,563 |
| Gulf County | 23 | 12.05% | 15,990 | 14,270 |
| Jefferson County | 24 | 11.57% | 16,069 | 14,403 |
| Suwannee County | 25 | 11.44% | 48,495 | 43,518 |
| Sarasota County | 26 | 10.93% | 483,927 | 436,262 |
| Highlands County | 27 | 10.87% | 112,352 | 101,341 |
| Collier County | 28 | 10.66% | 417,540 | 377,327 |
| Glades County | 29 | 10.56% | 13,354 | 12,079 |
| Clay County | 30 | 10.49% | 241,908 | 218,949 |
| Brevard County | 31 | 10.34% | 671,710 | 608,765 |
| Volusia County | 32 | 10.12% | 612,039 | 555,791 |
| DeSoto County | 33 | 9.31% | 37,267 | 34,093 |
| Dixie County | 34 | 9.04% | 18,206 | 16,697 |
| Indian River County | 35 | 8.47% | 174,038 | 160,454 |
| Union County | 36 | 8.37% | 16,735 | 15,442 |
| Okeechobee County | 37 | 8.1% | 42,875 | 39,662 |
| Lafayette County | 38 | 7.59% | 8,861 | 8,236 |
| Hillsborough County | 39 | 7.56% | 1,577,032 | 1,466,246 |
| Duval County | 40 | 7.36% | 1,071,194 | 997,800 |
| Orange County | 41 | 7.22% | 1,535,016 | 1,431,608 |
| Columbia County | 42 | 6.75% | 74,467 | 69,758 |
| Putnam County | 43 | 6.69% | 78,295 | 73,383 |
| Baker County | 44 | 6.58% | 29,963 | 28,114 |
| Washington County | 45 | 6.35% | 26,932 | 25,324 |
| Madison County | 46 | 5.66% | 18,874 | 17,863 |
| Palm Beach County | 47 | 5.56% | 1,577,304 | 1,494,203 |
| Martin County | 48 | 5.47% | 167,342 | 158,656 |
| Okaloosa County | 49 | 5.39% | 223,515 | 212,082 |
| Franklin County | 50 | 5.06% | 13,104 | 12,473 |
| Seminole County | 51 | 4.8% | 494,104 | 471,471 |
| Jackson County | 52 | 4.71% | 49,321 | 47,104 |
| Escambia County | 53 | 3.95% | 335,296 | 322,547 |
| Alachua County | 54 | 3.88% | 290,610 | 279,767 |
| Broward County | 55 | 3.58% | 2,012,945 | 1,943,437 |
| Miami-Dade County | 56 | 3.58% | 2,791,914 | 2,695,519 |
| Liberty County | 57 | 3.52% | 8,093 | 7,818 |
| Hamilton County | 58 | 2.84% | 14,123 | 13,733 |
| Holmes County | 59 | 2.67% | 20,114 | 19,591 |
| Gadsden County | 60 | 2.07% | 44,327 | 43,427 |
| Leon County | 61 | 1.86% | 299,384 | 293,925 |
| Hardee County | 62 | 1.67% | 25,757 | 25,335 |
| Bradford County | 63 | 0.8% | 28,460 | 28,235 |
| Pinellas County | 64 | -2.4% | 936,729 | 959,805 |
| Calhoun County | 65 | -2.52% | 13,358 | 13,703 |
| Taylor County | 66 | -4.71% | 20,731 | 21,756 |
| Monroe County | 67 | -4.89% | 78,797 | 82,851 |
Florida's counties show varied growth patterns from 2020 to 2026. St. Johns County leads with 4.42% annualized growth, followed by Osceola County (4.09%) and Walton County (4.08%). The largest counties are Miami-Dade County (2,791,914), Broward County (2,012,945), and Palm Beach County (1,577,304). Of the 67 counties in Florida, 63 are growing while just 4 have experienced population decline. Overall, counties averaged 1.66% annualized growth, with total population growing by 1.54% annually.
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