St. Johns County, FL Political Map | Democrat & Republican Areas in St. Johns County

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

St. Johns County leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.

 

About 89% of adults in St. Johns County typically vote, above the U.S. average of about 62%. Among adults in St. Johns County, ~33% vote Democratic, ~56% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.

How St. Johns County compares

Among counties within 50 miles, St. Johns County leans more Republican than 1 of 7 neighbors.

St. Johns County runs about 13 points more Republican than Florida as a whole.

Politics vary noticeably by city within St. Johns County. The southwest side is the most Republican-leaning (R+49) and the east side is the least Republican-leaning (R+8), a spread of about 41 points.

Why St. Johns 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 St. Johns County, not a ranked or complete list of what matters most.

St. Johns County votes Republican even though it is densely developed (about 49%, modestly below the Florida average of 57%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 75% of households in St. Johns County are family households, above 95% of counties.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; St. Johns 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 St. Johns County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. St. Johns 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 66%, about 6 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 83% of households in St. Johns County own their home, above 91% of counties. High high-school completion lines up with higher turnout, and about 96% of adults in St. Johns County have completed high school, above 95% of counties. Learn more about the findings and methodology on the political spectrum map.

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.