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.

Largest by land area

Collier County

1,997 sq mi

3.7% of Florida's land

Largest by population

Miami-Dade County

2,802,029 people

11.9% of Florida's population

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

The ten largest counties of Florida by land area. Land area excludes inland and coastal water.
RankNameLand areaPopulation
1Collier County1,997 sq mi417,131
2Palm Beach County1,964 sq mi1,575,726
3Miami-Dade County1,900 sq mi2,802,029
4Polk County1,798 sq mi874,790
5Marion County1,588 sq mi442,660
6Osceola County1,327 sq mi481,718
7Broward County1,203 sq mi2,013,317
8Hendry County1,156 sq mi48,276
9Levy County1,118 sq mi48,520
10Volusia County1,101 sq mi606,573

By population

The ten most populous counties of Florida, from the Census Bureau's Vintage 2025 estimates.
RankNamePopulationDensity
1Miami-Dade County2,802,0291,475 per sq mi
2Broward County2,013,3171,674 per sq mi
3Palm Beach County1,575,726802 per sq mi
4Hillsborough County1,574,1151,539 per sq mi
5Orange County1,528,0021,692 per sq mi
6Duval County1,062,9631,394 per sq mi
7Pinellas County948,5633,465 per sq mi
8Lee County875,6071,121 per sq mi
9Polk County874,790486 per sq mi
10Pasco County674,516903 per sq mi

And the smallest

Smallest by land area

Union County

243.9 sq mi

Least populous

Liberty County

8,035 people

More on Florida

Rebuilt from source data 30 August 2026. How these figures are produced.