21402 leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.
About 38% of adults in 21402 typically vote, below the U.S. average of about 62%. Among adults in 21402, ~23% vote Democratic, ~15% Republican, and ~62% don't vote. The map below shows estimated turnout by block group.
How 21402 compares
Among zip codes within 15 miles, 21402 leans more Democratic than 23 of 30 neighbors.
21402 runs about 6 points more Republican than Maryland as a whole.
Why 21402 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 21402, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 48% of adults in 21402 hold a bachelor's degree, about 20 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 72% of adults in 21402 have never been married, in the top fraction of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 21402, MD sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 21402 looks the way it does
Renters vote less often than owners. About 80% of households in 21402 rent, about 55 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and 21402 sits in the top quarter on routine-care measures. 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.