30021 is a Democratic stronghold. About 78% of voters here vote Democratic and 22% Republican.
About 43% of adults in 30021 typically vote, below the U.S. average of about 62%. Among adults in 30021, ~33% vote Democratic, ~10% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 30021 compares
Among zip codes within 15 miles, 30021 leans more Democratic than 31 of 60 neighbors.
30021 runs about 59 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30021 sits clearly on the Democratic side.
Politics vary noticeably by block within 30021. The north side is the most Democratic-leaning (D+74) and the southwest side is the least Democratic-leaning (D+40), a spread of about 34 points.
Why 30021 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 30021, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 30021 live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 51% of adults in 30021 have never been married, above 95% of zip codes. 30021 runs against the grain of Georgia, a Democratic-leaning outlier in a roughly evenly split state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 30021, GA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 30021 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 30021 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 41%, about 15 points below the Georgia average of 56%. Renters vote less often than owners, and about 73% of households in 30021 rent, compared to around 43% in nearby zip codes. High food insecurity lines up with lower turnout, and about 36% of adults in 30021 report food insecurity, above 97% 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.