21028 leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 90% of adults in 21028 typically vote, above the U.S. average of about 62%. Among adults in 21028, ~35% vote Democratic, ~55% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How 21028 compares
Among zip codes within 15 miles, 21028 leans more Republican than 13 of 33 neighbors.
21028 runs about 50 points more Republican than Maryland as a whole. Maryland leans Democratic overall, while 21028 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 21028. The northeast side is the most Republican-leaning (R+32) and the west side is the least Republican-leaning (R+15), a spread of about 17 points.
Why 21028 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 21028, not a ranked or complete list of what matters most.
21028 votes against the grain of Maryland. Maryland leans Democratic overall, while 21028 runs about 50 points more Republican. A high family-household share predicts Republican voting, and about 79% of households in 21028 are family households, above 89% of zip codes.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; 21028, MD sits in the bottom tenth nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in 21028 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 21028 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 73%, about 13 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 90% of households in 21028 own their home, compared to around 73% in nearby zip codes. High high-school completion lines up with higher turnout, and about 96% of adults in 21028 have completed high school, above 82% 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.