Collier County, FL Political Map | Democrat & Republican Areas in Collier County

By the BestNeighborhood data science team. Last updated May 2026.

Collier County leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.

 

About 74% of adults in Collier County typically vote, above the U.S. average of about 62%. Among adults in Collier County, ~30% vote Democratic, ~45% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.

How Collier County compares

Collier County sits in a sparsely populated area with few comparable counties nearby.

Collier County runs about 7 points more Republican than Florida as a whole.

Politics vary noticeably by city within Collier County. The east side is the most Republican-leaning (R+38) and the northeast side is the least Republican-leaning (R+15), a spread of about 24 points.

Why Collier County leans the way it does

This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Collier County, not a ranked or complete list of what matters most.

Collier County votes Republican even though it is densely developed (about 73%, well above the Florida average of 57%). Here an older population outweighs the Democratic lean that density usually predicts. A high family-household share predicts Republican voting, and about 69% of households in Collier County are family households, above 75% of counties.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Collier County, FL sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Collier County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Collier County is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 63%, above 66% of counties. Learn more about the findings and methodology on the political spectrum map.

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Sources and methodology

Precinct-level voting records used to fit the model come from Florida Division of Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.

Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.

Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.