30340 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 52% of adults in 30340 typically vote, below the U.S. average of about 62%. Among adults in 30340, ~36% vote Democratic, ~16% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How 30340 compares
Among zip codes within 15 miles, 30340 leans more Democratic than 28 of 65 neighbors.
30340 runs about 39 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30340 sits clearly on the Democratic side.
Politics vary noticeably by block within 30340. The east side is the most Democratic-leaning (D+61) and the northeast side is the least Democratic-leaning (D+17), a spread of about 45 points.
Why 30340 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 30340, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 96% of residents in 30340 live in densely developed areas, about 60 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 46% of adults in 30340 have never been married, above 93% of zip codes. 30340 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; 30340, GA sits in the top tenth nationally on this measure.
Why turnout in 30340 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 30340 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 24%, about 11 points above the Georgia average of 14%. Renters vote less often than owners, and about 54% of households in 30340 rent, about 29 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 26% of adults in 30340 report food insecurity, above 90% 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.