36604 leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 66% of adults in 36604 typically vote, near the U.S. average of about 62%. Among adults in 36604, ~43% vote Democratic, ~23% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 36604 compares
Among zip codes within 15 miles, 36604 leans more Democratic than 17 of 27 neighbors.
36604 runs about 60 points more Democratic than Alabama as a whole. Alabama leans Republican overall, while 36604 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 36604. The southeast side is the most Democratic-leaning (D+69) and the west side is the least Democratic-leaning (D+5), a spread of about 64 points.
Why 36604 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 36604, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 36604 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 36604 sits in the top quarter (about 44%, above 84% of zip codes). 36604 runs against the grain of Alabama, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 36604, AL sits in the top quarter nationally on this measure.
Why turnout in 36604 looks the way it does
Turnout in 36604 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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 Alabama Secretary of State, 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.