Berks County leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 71% of adults in Berks County typically vote, above the U.S. average of about 62%. Among adults in Berks County, ~33% vote Democratic, ~38% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How Berks County compares
Among counties within 50 miles, Berks County leans more Republican than 9 of 13 neighbors.
Berks County runs about 6 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by city within Berks County. The south side runs the most Democratic (D+6) and the northwest side runs the most Republican (R+41), a spread of about 47 points.
Why Berks 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 Berks County, not a ranked or complete list of what matters most.
Berks County votes Republican even though it is densely developed (about 63%, well above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Berks County, PA sits above the national average 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 Berks County looks the way it does
Turnout in Berks County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Lehigh County, PA D+6
- Lebanon County, PA R+31
- Chester County, PA D+14
- Lancaster County, PA R+17
- Schuylkill County, PA R+36
- Montgomery County, PA D+21
- Carbon County, PA R+35
- Northampton County, PA Even
- Delaware County, PA D+27
- Dauphin County, PA D+12
Counties with Similar Populations
- Lucas County, OH D+17
- Pinal County, AZ R+16
- Sarasota County, FL R+17
- Hillsborough County, NH D+11
- Clackamas County, OR D+13
- Cameron County, TX R+2
- Loudoun County, VA D+18
- Monterey County, CA D+29
- Dakota County, MN D+11
- Jefferson Parish, LA D+4
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.