30909 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 71% of adults in 30909 typically vote, above the U.S. average of about 62%. Among adults in 30909, ~48% vote Democratic, ~23% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 30909 compares
Among zip codes within 15 miles, 30909 leans more Democratic than 14 of 19 neighbors.
30909 runs about 36 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30909 sits clearly on the Democratic side.
Politics vary noticeably by block within 30909. The southwest side is the most Democratic-leaning (D+55) and the north side is the least Democratic-leaning (D+6), a spread of about 49 points.
Why 30909 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 30909, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 30909 is about 39%, about 34 points below the U.S. average of 72%. High college attainment predicts Democratic voting, and 30909 sits in the top quarter (about 40%, above 81% of zip codes). 30909 runs against the grain of Georgia, a Democratic-leaning outlier in a roughly evenly split state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 30909, GA sits in the top quarter nationally on this measure.
Why turnout in 30909 looks the way it does
Turnout in 30909 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 Georgia Elections Division, 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.