30309 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 64% of adults in 30309 typically vote, near the U.S. average of about 62%. Among adults in 30309, ~47% vote Democratic, ~17% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How 30309 compares
Among zip codes within 15 miles, 30309 leans more Democratic than 28 of 70 neighbors.
30309 runs about 50 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30309 sits clearly on the Democratic side.
Politics vary noticeably by block within 30309. The southwest side is the most Democratic-leaning (D+53) and the northeast side is the least Democratic-leaning (D+35), a spread of about 18 points.
Why 30309 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 30309, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 82% of adults in 30309 hold a bachelor's degree, about 54 points above the U.S. average of 28%. Dense areas vote Democratic, and 30309 sits in the top fifth on density (more than 99%, above 96% of zip codes). 30309 runs against the grain of Georgia, a Democratic-leaning outlier in a roughly evenly split state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 30309, GA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 30309 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 30309 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 30309 have completed high school, above 91% of zip codes. 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.