Rensselaer County leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 69% of adults in Rensselaer County typically vote, above the U.S. average of about 62%. Among adults in Rensselaer County, ~37% vote Democratic, ~32% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Rensselaer County compares
Among counties within 50 miles, Rensselaer County leans more Democratic than 7 of 12 neighbors.
Rensselaer County runs about 6 points more Republican than New York as a whole.
Politics vary noticeably by city within Rensselaer County. The west side runs the most Democratic (D+29) and the northeast side runs the most Republican (R+27), a spread of about 56 points.
Why Rensselaer 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 Rensselaer County, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 37% of adults in Rensselaer County hold a bachelor's degree, about 9 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 37% of adults in Rensselaer County have never been married, above 90% of counties.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Rensselaer County, NY sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Rensselaer County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Rensselaer 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 64%, above 76% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Albany County, NY D+30
- Schenectady County, NY D+17
- Saratoga County, NY Even
- Berkshire County, MA D+27
- Columbia County, NY D+12
- Bennington County, VT D+17
- Greene County, NY R+13
- Montgomery County, NY R+24
- Schoharie County, NY R+29
- Washington County, NY R+23
Counties with Similar Populations
- Comal County, TX R+36
- Dorchester County, SC R+12
- Catawba County, NC R+33
- Johnson County, IN R+35
- Portage County, OH R+12
- St. Clair County, MI R+31
- Ouachita Parish, LA R+13
- Jackson County, MI R+14
- Hampshire County, MA D+45
- Indian River County, FL R+21
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.