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

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

Mason leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.

 

About 84% of adults in Mason typically vote, above the U.S. average of about 62%. Among adults in Mason, ~39% vote Democratic, ~45% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.

How Mason compares

Among cities within 25 miles, Mason leans more Republican than 43 of 146 neighbors.

Politically, Mason sits close to the rest of Ohio.

Politics vary noticeably by neighborhood within Mason. The northeast side is the most split-leaning (R+17) and the south side is the least split-leaning (Even), a spread of about 15 points.

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

Mason votes Republican even though it is densely developed (about 87%, far above the Ohio average of 34%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 78% of households in Mason are family households, above 86% of cities.

Food insecurity and voter turnout

Places with low food insecurity tend to turn out at a higher rate; Mason, OH sits in the bottom tenth nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.

Why turnout in Mason looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Mason 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 97% of adults in Mason have completed high school, above 89% of cities. 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.