Slippery Rock, PA Political Map | Democrat & Republican Areas in Slippery Rock

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

Slippery Rock leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.

 

About 60% of adults in Slippery Rock typically vote, near the U.S. average of about 62%. Among adults in Slippery Rock, ~24% vote Democratic, ~36% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.

How Slippery Rock compares

Among cities within 25 miles, Slippery Rock leans more Republican than 2 of 120 neighbors.

Slippery Rock runs about 18 points more Republican than Pennsylvania as a whole.

Politics vary noticeably by neighborhood within Slippery Rock. The north side runs the most Democratic (D+3) and the southeast side runs the most Republican (R+53), a spread of about 56 points.

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

Slippery Rock votes Republican even though it is densely developed (about 35%, above 82% of cities). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Never-married share, developed land, and voter turnout

Places that combine a never-married-heavy adult population and a heavily developed built environment tend to turn out at a lower rate, as Slippery Rock, PA does.

Why turnout in Slippery Rock looks the way it does

Renters vote less often than owners. About 53% of households in Slippery Rock rent, about 28 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 96% of adults in Slippery Rock have completed high school, above 86% of cities. 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 Pennsylvania Department of State, Bureau 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.