County Maps US

Collier County, Florida

The largest of Florida's 67 counties by land area.

CountyFIPS 12021

Within Florida
Collier County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
417,131
+39,804 (+10.5%) since 2020
Land area
1,997
square miles. A further 23.3% of the total area is water
Population density
209
people per square mile, computed rather than published
County seat
East Naples
Seat of county government.
Established
1923
102 years ago
Largest city
Naples city
Population 20,114.

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; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Collier County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Collier County, Florida from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 669 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Collier County ranks

Position among the 67 counties of Florida, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn FloridaNationally
Population417,13119th of 67186th of 3,144
Land area1,997 sq mi1st of 67288th of 3,144
Population density209 per sq mi34th of 67547th of 3,144
Median household income$90,0453rd of 67297th of 3,143

Full data for Collier County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population417,131Vintage 2025 Population Estimates
Population in 2020377,327Vintage 2025 Population Estimates
2020 estimates base?375,763Vintage 2025 Population Estimates
Land area1,997 sq mi2025 Gazetteer Files
Water area608 sq mi2025 Gazetteer Files
Total area2,605 sq mi2025 Gazetteer Files
Population density?209 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$90,045American Community Survey 2020-2024 5-Year Estimates
Median home value$540,700American Community Survey 2020-2024 5-Year Estimates
Median age53.3American Community Survey 2020-2024 5-Year Estimates
Households165,875American Community Survey 2020-2024 5-Year Estimates
Housing units239,406American Community Survey 2020-2024 5-Year Estimates

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; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-625
3,556 births, 4,181 deaths
Net migration
+1,095
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Collier County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Monroe CountyFlorida61 mi80,406
Hendry CountyFlorida60 mi48,276
Lee CountyFlorida57 mi875,607
Broward CountyFlorida19 mi2,013,317
Miami-Dade CountyFlorida12 mi2,802,029

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

Side by side

All 67 counties of Florida

Open the interactive Florida county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.