Dayton, OH Political Map | Democrat & Republican Areas in Dayton

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

Dayton leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.

 

About 76% of adults in the Dayton area typically vote, above the U.S. average of about 62%. Among adults in the Dayton area, ~36% vote Democratic, ~40% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.

How Dayton compares

Among cities within 25 miles, Dayton leans more Republican than 8 of 102 neighbors.

Dayton runs about 6 points more Democratic than Ohio as a whole.

Politics vary noticeably by neighborhood within Dayton. The west side runs the most Democratic (D+59) and the north side runs the most Republican (R+25), a spread of about 83 points.

Why Dayton 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 Dayton, not a ranked or complete list of what matters most.

Dayton votes Republican even though it is densely developed (about 77%, far above the Ohio average of 34%). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Dayton, OH sits in the top tenth nationally on this measure.

Why turnout in Dayton looks the way it does

Turnout in the Dayton area 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 Ohio Secretary of State, Elections, 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.