Cairnbrook, PA Political Map | Democrat & Republican Areas in Cairnbrook

Cairnbrook is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.

 
Cairnbrook, PA block-group political-lean map
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About 78% of adults in Cairnbrook typically vote, above the U.S. average of about 62%. Among adults in Cairnbrook, ~16% vote Democratic, ~62% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.

Cairnbrook, PA block-group voter-turnout map
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How Cairnbrook compares

Among cities within 25 miles, Cairnbrook leans more Republican than 64 of 139 neighbors.

Cairnbrook runs about 57 points more Republican than Pennsylvania as a whole.

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

Areas with a high white share and below-average college attainment vote Republican. In Cairnbrook, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 12 points below the Pennsylvania average of 26%.

Homeownership and voter turnout

Places with homeowner-heavy households tend to turn out at a higher rate; Cairnbrook, PA sits in the top quarter nationally on this measure.

Why turnout in Cairnbrook looks the way it does

Turnout in Cairnbrook sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.

Cities with Similar Populations

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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.