Andover, NJ Political Map | Democrat & Republican Areas in Andover

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

Andover leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.

 

About 83% of adults in Andover typically vote, above the U.S. average of about 62%. Among adults in Andover, ~32% vote Democratic, ~51% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.

How Andover compares

Among cities within 25 miles, Andover leans more Republican than 97 of 153 neighbors.

Andover runs about 29 points more Republican than New Jersey as a whole. New Jersey leans Democratic overall, while Andover is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within Andover. The west side is the most Republican-leaning (R+30) and the east side is the least Republican-leaning (R+19), a spread of about 11 points.

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

Andover votes Republican even though it is densely developed (about 22%, far below the New Jersey average of 61%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 79% of households in Andover are family households, above 88% of cities. Andover runs against the grain of New Jersey, a Republican-leaning pocket in a Democratic-leaning state.

Homeownership and voter turnout

Places with homeowner-heavy households tend to turn out at a higher rate; Andover, NJ sits in the top quarter nationally on this measure.

Why turnout in Andover looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Andover 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 73%, about 13 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Andover own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Andover have completed high school, above 82% 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.