21250 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 51% of adults in 21250 typically vote, below the U.S. average of about 62%. Among adults in 21250, ~37% vote Democratic, ~14% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 21250 compares
Among zip codes within 15 miles, 21250 leans more Democratic than 35 of 71 neighbors.
21250 runs about 16 points more Democratic than Maryland as a whole.
Why 21250 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 21250, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 83% of residents in 21250 live in densely developed areas, about 46 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 21250 sits in the top quarter (about 38%, above 79% of zip codes). A high never-married share predicts Democratic voting, and about 98% of adults in 21250 have never been married, in the top fraction of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 21250, MD sits in the top quarter nationally on this measure.
Why turnout in 21250 looks the way it does
Areas with low high-school completion turn out at lower rates. More than 99% of adults in 21250 have completed high school, about 10 points above the U.S. average of 90%. High food insecurity lines up with lower turnout, and about 28% of adults in 21250 report food insecurity, above 93% of zip codes. 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.