20874 leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 61% of adults in 20874 typically vote, near the U.S. average of about 62%. Among adults in 20874, ~45% vote Democratic, ~16% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 20874 compares
Among zip codes within 15 miles, 20874 leans more Democratic than 39 of 48 neighbors.
20874 runs about 20 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 20874. The northeast side is the most Democratic-leaning (D+55) and the southwest side is the least Democratic-leaning (D+37), a spread of about 18 points.
Why 20874 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 20874, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 79% of residents in 20874 live in densely developed areas, about 42 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 20874 sits in the top quarter (about 49%, above 88% of zip codes). A high never-married share predicts Democratic voting, and about 35% of adults in 20874 have never been married, above 80% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 20874, MD sits in the top tenth nationally on this measure.
Why turnout in 20874 looks the way it does
Turnout in 20874 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 Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Maryland State Board 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.