45121 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 72% of adults in 45121 typically vote, above the U.S. average of about 62%. Among adults in 45121, ~15% vote Democratic, ~57% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 45121 compares
Among zip codes within 15 miles, 45121 leans more Republican than 1 of 16 neighbors.
45121 runs about 47 points more Republican than Ohio as a whole.
Politics vary noticeably by block within 45121. The northeast side is the most Republican-leaning (R+66) and the southeast side is the least Republican-leaning (R+55), a spread of about 10 points.
Why 45121 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 45121, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 45121, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 18% of adults hold a bachelor's degree, about 6 points below the Ohio average of 23%.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 45121, OH sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 45121 looks the way it does
Turnout in 45121 sits close to the national pattern. 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 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.