Plainfield leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 78% of adults in Plainfield typically vote, above the U.S. average of about 62%. Among adults in Plainfield, ~20% vote Democratic, ~58% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Plainfield compares
Among cities within 25 miles, Plainfield leans more Republican than 58 of 135 neighbors.
Plainfield runs about 47 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by neighborhood within Plainfield. The north side is the most Republican-leaning (R+57) and the southeast side is the least Republican-leaning (R+47), a spread of about 10 points.
Why Plainfield leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Plainfield. The lean here lands roughly where demographic data alone would predict.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Plainfield, PA sits above the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Plainfield looks the way it does
Turnout in Plainfield 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
- Wolfs Crossroads, PA R+48
- Entlerville, PA R+58
- Dickinson, PA R+52
- Newville, PA R+52
- Carlisle, PA R+8
- Caprivi, PA R+51
- Schlusser, PA R+19
- Salem, PA R+53
- Stoughstown, PA R+51
- Mount Holly Springs, PA R+29
Cities with Similar Populations
- Prosperity, PA R+55
- Lynnview, KY R+4
- Phillipsburg, TX R+64
- Farmhaven, MS D+14
- Crystal, ID R+63
- Burke, SD R+67
- Mohall, ND R+63
- Roosevelt, WI R+24
- Deerfield Parade, NH R+4
- Utica, MN R+43
All Local Stats
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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.