30305 leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.
About 81% of adults in 30305 typically vote, above the U.S. average of about 62%. Among adults in 30305, ~48% vote Democratic, ~33% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How 30305 compares
Among zip codes within 15 miles, 30305 leans more Democratic than 7 of 68 neighbors.
30305 runs about 21 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and 30305 sits clearly on the Democratic side.
Politics vary noticeably by block within 30305. The northeast side runs the most Democratic (D+28) and the west side runs the most Republican (R+14), a spread of about 42 points.
Why 30305 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 30305, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 79% of adults in 30305 hold a bachelor's degree, about 51 points above the U.S. average of 28%. Dense areas vote Democratic, and 30305 sits in the top fifth on density (more than 99%, above 96% of zip codes). A high never-married share predicts Democratic voting, and about 40% of adults in 30305 have never been married, above 87% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 30305, GA sits in the top tenth nationally on this measure.
Why turnout in 30305 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 30305 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 30305 have completed high school, above 96% 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.