Lewis County, NY Political Map | Democrat & Republican Areas in Lewis County

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

Lewis County leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.

 

About 66% of adults in Lewis County typically vote, near the U.S. average of about 62%. Among adults in Lewis County, ~17% vote Democratic, ~49% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.

How Lewis County compares

Lewis County sits in a sparsely populated area with few comparable counties nearby.

Lewis County runs about 60 points more Republican than New York as a whole. New York leans Democratic overall, while Lewis County is one of the few Republican-leaning pockets.

Politics vary noticeably by city within Lewis County. The southwest side is the most Republican-leaning (R+58) and the east side is the least Republican-leaning (R+42), a spread of about 16 points.

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

Areas with a high white share and below-average college attainment vote Republican. In Lewis County, about 93% of residents are non-Hispanic white, about 21 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 15 points below the New York average of 34%. Rural areas vote Republican, and Lewis County sits in the bottom quarter on density (about 9%, below 85% of counties). Lewis County runs against the grain of New York, a Republican-leaning pocket in a Democratic-leaning state.

Walkability and Republican lean

Places with a low walkability score tend to lean Republican; Lewis County, NY sits in the bottom 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 Lewis County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Lewis 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 61%, above 57% of counties. Homeowners vote more often than renters, and about 81% of households in Lewis County own their home, above 82% of counties. Learn more about the findings and methodology on the political spectrum map.

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.