20715 leans heavily Democratic by roughly 46 points: about 73% of voters vote Democratic and 27% Republican.
About 74% of adults in 20715 typically vote, above the U.S. average of about 62%. Among adults in 20715, ~54% vote Democratic, ~20% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 20715 compares
Among zip codes within 15 miles, 20715 leans more Democratic than 28 of 71 neighbors.
20715 runs about 17 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 20715. The northwest side is the most Democratic-leaning (D+56) and the east side is the least Democratic-leaning (D+36), a spread of about 20 points.
Why 20715 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 20715, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 49% of adults in 20715 hold a bachelor's degree, about 21 points above the U.S. average of 28%. Density combined with diversity predicts Democratic voting, and non-Hispanic white share in 20715 is about 40%, about 33 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 38% of adults in 20715 have never been married, above 84% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 20715, MD sits in the top quarter nationally on this measure.
Why turnout in 20715 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 20715 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 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 91% of households in 20715 own their home, about 16 points above the U.S. average of 75%. 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.