33139 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 57% of adults in 33139 typically vote, near the U.S. average of about 62%. Among adults in 33139, ~30% vote Democratic, ~27% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How 33139 compares
Among zip codes within 15 miles, 33139 leans more Democratic than 34 of 57 neighbors.
33139 runs about 20 points more Democratic than Florida as a whole. Florida leans Republican overall, while 33139 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 33139. The north side runs the most Democratic (D+16) and the southeast side runs the most Republican (R+3), a spread of about 19 points.
Why 33139 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 33139, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in 33139 live in densely developed areas, about 51 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 33139 sits in the top quarter (about 57%, above 93% of zip codes). A high never-married share predicts Democratic voting, and about 38% of adults in 33139 have never been married, above 84% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 33139, FL sits in the top tenth nationally on this measure.
Why turnout in 33139 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 33139 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 60% of households in 33139 rent, about 35 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 33139 sits in the top 15% on a violent-crime measure. 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.