Monroe County leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 71% of adults in Monroe County typically vote, above the U.S. average of about 62%. Among adults in Monroe County, ~44% vote Democratic, ~27% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How Monroe County compares
Among counties within 50 miles, Monroe County is the most Democratic-leaning.
Monroe County runs about 12 points more Democratic than New York as a whole.
Politics vary noticeably by city within Monroe County. The east side runs the most Democratic (D+40) and the northwest side runs the most Republican (R+9), a spread of about 49 points.
Why Monroe County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Monroe County, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 79% of residents in Monroe County live in densely developed areas, about 43 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Monroe County sits in the top quarter (about 40%, above 92% of counties). A high never-married share predicts Democratic voting, and about 38% of adults in Monroe County have never been married, above 91% of counties.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Monroe County, NY sits in the top tenth nationally on this measure.
Why turnout in Monroe County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Monroe County 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 66%, about 6 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Wayne County, NY R+23
- Ontario County, NY R+2
- Livingston County, NY R+19
- Genesee County, NY R+29
- Orleans County, NY R+32
- Wyoming County, NY R+39
- Yates County, NY R+28
- Seneca County, NY R+18
- Cayuga County, NY R+17
- Niagara County, NY R+10
Counties with Similar Populations
- Lee County, FL R+19
- DeKalb County, GA D+63
- San Mateo County, CA D+48
- Cobb County, GA D+20
- San Joaquin County, CA D+4
- Jefferson County, KY D+20
- El Paso County, CO R+7
- Norfolk County, MA D+30
- Polk County, FL R+18
- Hudson County, NJ D+27
Sources and methodology
Precinct-level voting records used to fit the model come from New York State Board of 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.