The largest county in Florida
There are two right answers. By land area it is Collier County; by population it is Miami-Dade County. Which one you want depends on what you meant by largest.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.
By land area
| Rank | Name | Land area | Population |
|---|---|---|---|
| 1 | Collier County | 1,997 sq mi | 417,131 |
| 2 | Palm Beach County | 1,964 sq mi | 1,575,726 |
| 3 | Miami-Dade County | 1,900 sq mi | 2,802,029 |
| 4 | Polk County | 1,798 sq mi | 874,790 |
| 5 | Marion County | 1,588 sq mi | 442,660 |
| 6 | Osceola County | 1,327 sq mi | 481,718 |
| 7 | Broward County | 1,203 sq mi | 2,013,317 |
| 8 | Hendry County | 1,156 sq mi | 48,276 |
| 9 | Levy County | 1,118 sq mi | 48,520 |
| 10 | Volusia County | 1,101 sq mi | 606,573 |
By population
| Rank | Name | Population | Density |
|---|---|---|---|
| 1 | Miami-Dade County | 2,802,029 | 1,475 per sq mi |
| 2 | Broward County | 2,013,317 | 1,674 per sq mi |
| 3 | Palm Beach County | 1,575,726 | 802 per sq mi |
| 4 | Hillsborough County | 1,574,115 | 1,539 per sq mi |
| 5 | Orange County | 1,528,002 | 1,692 per sq mi |
| 6 | Duval County | 1,062,963 | 1,394 per sq mi |
| 7 | Pinellas County | 948,563 | 3,465 per sq mi |
| 8 | Lee County | 875,607 | 1,121 per sq mi |
| 9 | Polk County | 874,790 | 486 per sq mi |
| 10 | Pasco County | 674,516 | 903 per sq mi |
And the smallest
More on Florida
Rebuilt from source data 30 August 2026. How these figures are produced.