30339 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 65% of adults in 30339 typically vote, near the U.S. average of about 62%. Among adults in 30339, ~45% vote Democratic, ~20% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How 30339 compares
Among zip codes within 15 miles, 30339 leans more Democratic than 23 of 63 neighbors.
30339 runs about 40 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30339 sits clearly on the Democratic side.
Politics vary noticeably by block within 30339. The west side runs the most Democratic (D+45) and the southeast side runs the most Republican (R+6), a spread of about 52 points.
Why 30339 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 30339, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in 30339 hold a bachelor's degree, about 43 points above the U.S. average of 28%. Dense areas vote Democratic, and 30339 sits in the top fifth on density (about 88%, above 87% of zip codes). 30339 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; 30339, GA sits in the top quarter 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 30339 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 30339 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 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 30339 have completed high school, above 95% 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.