33621 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 60% of adults in 33621 typically vote, near the U.S. average of about 62%. Among adults in 33621, ~27% vote Democratic, ~33% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 33621 compares
Among zip codes within 15 miles, 33621 leans more Republican than 37 of 43 neighbors.
Politically, 33621 sits close to the rest of Florida.
Politics vary noticeably by block within 33621. The northeast side runs the most Democratic (D+5) and the south side runs the most Republican (R+20), a spread of about 25 points.
Why 33621 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 33621, not a ranked or complete list of what matters most.
33621 votes Republican even though it is densely developed (about 82%, well above 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 86% of households in 33621 are family households, above 98% of zip codes.
Homeownership and voter turnout
Places with renter-heavy households tend to turn out at a lower rate; 33621, FL sits in the bottom tenth nationally on this measure.
Why turnout in 33621 looks the way it does
Renters vote less often than owners. More than 99% of households in 33621 rent, about 75 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.