21005 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 60% of adults in 21005 typically vote, near the U.S. average of about 62%. Among adults in 21005, ~37% vote Democratic, ~23% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 21005 compares
Among zip codes within 15 miles, 21005 leans more Democratic than 25 of 27 neighbors.
Politically, 21005 sits close to the rest of Maryland.
Politics vary noticeably by block within 21005. The northeast side is the most Democratic-leaning (D+28) and the west side is the least Democratic-leaning (D+5), a spread of about 22 points.
Why 21005 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 21005, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 55% of adults in 21005 hold a bachelor's degree, about 27 points above the U.S. average of 28%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 21005, MD sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 21005 looks the way it does
Renters vote less often than owners. About 97% of households in 21005 rent, about 72 points above the U.S. average of 25%. 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.