30105 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 78% of adults in 30105 typically vote, above the U.S. average of about 62%. Among adults in 30105, ~11% vote Democratic, ~67% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 30105 compares
Among zip codes within 15 miles, 30105 leans more Republican than 7 of 10 neighbors.
30105 runs about 69 points more Republican than Georgia as a whole.
Politics vary noticeably by block within 30105. The northwest side is the most Republican-leaning (R+73) and the north side is the least Republican-leaning (R+63), a spread of about 10 points.
Why 30105 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 30105, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 90% of residents in 30105 drive to work alone, about 16 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 82% of households in 30105 are family households, above 94% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 30105, GA sits in the bottom 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 30105 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 30105 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 63%, above 55% 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.