21211 is a Democratic stronghold. About 82% of voters here vote Democratic and 18% Republican.
About 74% of adults in 21211 typically vote, above the U.S. average of about 62%. Among adults in 21211, ~61% vote Democratic, ~13% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 21211 compares
Among zip codes within 15 miles, 21211 leans more Democratic than 49 of 68 neighbors.
21211 runs about 36 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 21211. The south side is the most Democratic-leaning (D+81) and the northwest side is the least Democratic-leaning (D+45), a spread of about 36 points.
Why 21211 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 21211, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 21211 live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 21211 sits in the top quarter (about 63%, above 95% of zip codes). A high never-married share predicts Democratic voting, and about 45% of adults in 21211 have never been married, above 92% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 21211, MD sits in the top tenth 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 21211 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 21211 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 66%, about 6 points above the U.S. average of 60%. 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.