Penns Grove leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 50% of adults in Penns Grove typically vote, below the U.S. average of about 62%. Among adults in Penns Grove, ~33% vote Democratic, ~17% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How Penns Grove compares
Among cities within 25 miles, Penns Grove leans more Democratic than 166 of 200 neighbors.
Penns Grove runs about 26 points more Democratic than New Jersey as a whole.
Politics vary noticeably by neighborhood within Penns Grove. The west side runs the most Democratic (D+40) and the southeast side runs the most Republican (R+15), a spread of about 55 points.
Why Penns Grove 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 Penns Grove, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 83% of residents in Penns Grove live in densely developed areas, about 47 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 49% of adults in Penns Grove have never been married, above 98% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Penns Grove, NJ sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Penns Grove looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Penns Grove is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 49%, about 19 points below the New Jersey average of 67%. Renters vote less often than owners, and about 56% of households in Penns Grove rent, compared to around 25% in nearby cities. High food insecurity lines up with lower turnout, and about 33% of adults in Penns Grove report food insecurity, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Carneys Point, NJ D+5
- Golf Manor, NJ R+14
- Pedricktown, NJ R+14
- Deepwater, NJ R+22
- Edgemoor, DE D+51
- Bellefonte, DE D+26
- Nortonville, NJ R+28
- Claymont, DE D+42
- Ardentown, DE D+31
- Marshalltown, NJ R+33
Cities with Similar Populations
- Fort Dix, NJ D+9
- Manteo, NC R+27
- Zephyrhills West, FL R+29
- Owings, MD R+20
- West Jefferson, NC R+46
- Hayden, AL R+82
- South Williamsport, PA R+27
- Cherry Valley, CA R+27
- Plainedge, NY R+28
- East China, MI R+40
Sources and methodology
Precinct-level voting records used to fit the model come from New Jersey Division 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.