Decatur, GA Political Map | Democrat & Republican Areas in Decatur

By the BestNeighborhood data science team. Last updated May 2026.

Decatur is a Democratic stronghold. About 87% of voters here vote Democratic and 13% Republican.

 

About 78% of adults in Decatur typically vote, above the U.S. average of about 62%. Among adults in Decatur, ~68% vote Democratic, ~10% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.

How Decatur compares

Among cities within 25 miles, Decatur leans more Democratic than 53 of 65 neighbors.

Decatur runs about 76 points more Democratic than Georgia as a whole. Georgia is roughly evenly split, and Decatur sits clearly on the Democratic side.

Politics vary noticeably by neighborhood within Decatur. The south side is the most Democratic-leaning (D+84) and the north side is the least Democratic-leaning (D+48), a spread of about 36 points.

Why Decatur leans the way it does

This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Decatur, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 91% of residents in Decatur live in densely developed areas, about 54 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Decatur sits in the top quarter (about 46%, above 92% of cities). Decatur runs against the grain of Georgia, a Democratic-leaning outlier in a roughly evenly split state.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Decatur, GA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Decatur looks the way it does

Turnout in Decatur sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.

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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.