Morris Plains, NJ Political Map | Democrat & Republican Areas in Morris Plains

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

Morris Plains leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 81% of adults in Morris Plains typically vote, above the U.S. average of about 62%. Among adults in Morris Plains, ~44% vote Democratic, ~36% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.

How Morris Plains compares

Among cities within 25 miles, Morris Plains leans more Democratic than 185 of 254 neighbors.

Morris Plains runs about 5 points more Democratic than New Jersey as a whole.

Politics vary noticeably by neighborhood within Morris Plains. The southwest side runs the most Democratic (D+15) and the southeast side runs the most Republican (Even), a spread of about 16 points.

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

Areas with high college attainment vote Democratic. About 67% of adults in Morris Plains hold a bachelor's degree, about 38 points above the U.S. average of 28%. Dense areas vote Democratic, and Morris Plains sits in the top fifth on density (about 79%, above 94% of cities). A high never-married share predicts Democratic voting, and about 32% of adults in Morris Plains have never been married, above 81% of cities.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Morris Plains, NJ 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 Morris Plains looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Morris Plains 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Morris Plains have completed high school, above 85% 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 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.