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

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

Thornburg leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.

 

About more than 99% of adults in Thornburg typically vote, above the U.S. average of about 62%. Among adults in Thornburg, ~64% vote Democratic, ~45% Republican, and ~-9% don't vote. The map below shows estimated turnout by block group.

How Thornburg compares

Among cities within 25 miles, Thornburg leans more Democratic than 203 of 236 neighbors.

Thornburg runs about 20 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and Thornburg sits clearly on the Democratic side.

Politics vary noticeably by neighborhood within Thornburg. The east side runs the most Democratic (D+20) and the northwest side runs the most Republican (R+4), a spread of about 23 points.

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

Areas with high college attainment vote Democratic. About 76% of adults in Thornburg hold a bachelor's degree, about 48 points above the U.S. average of 28%. Dense areas vote Democratic, and Thornburg sits in the top fifth on density (about 69%, above 92% of cities). Thornburg runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Thornburg, PA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in Thornburg looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Thornburg 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 77%, about 17 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in Thornburg own their home, compared to around 71% in nearby cities. High high-school completion lines up with higher turnout, and about 98% of adults in Thornburg have completed high school, above 97% 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.