Upper Mill leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 83% of adults in Upper Mill typically vote, above the U.S. average of about 62%. Among adults in Upper Mill, ~24% vote Democratic, ~59% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Upper Mill compares
Among cities within 25 miles, Upper Mill leans more Republican than 69 of 138 neighbors.
Upper Mill runs about 41 points more Republican than Pennsylvania as a whole.
Why Upper Mill leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Upper Mill. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Upper Mill, PA sits in the top quarter 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 Upper Mill looks the way it does
Turnout in Upper Mill 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 Cities
- Mount Holly Springs, PA R+29
- Toland, PA R+40
- Boiling Springs, PA R+24
- Gardners, PA R+46
- Idaville, PA R+50
- York Springs, PA R+47
- Franklintown, PA R+45
- Dillsburg, PA R+35
- Mount Tabor, PA R+41
- Carlisle, PA R+8
Cities with Similar Populations
- Kinkler, TX R+70
- New Canton, IL R+68
- McNeil, TX R+49
- Haw Branch, NC R+49
- Standard, IL R+32
- Throopsville, NY R+35
- Winifrede, WV R+56
- Note, GA R+17
- Helena, KY R+61
- West Jefferson, AL R+84
All Local Stats
Home Services
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.