21029 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 89% of adults in 21029 typically vote, above the U.S. average of about 62%. Among adults in 21029, ~60% vote Democratic, ~29% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How 21029 compares
Among zip codes within 15 miles, 21029 leans more Democratic than 18 of 67 neighbors.
21029 runs about 5 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 21029. The southeast side is the most Democratic-leaning (D+42) and the southwest side is the least Democratic-leaning (D+20), a spread of about 22 points.
Why 21029 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 21029, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 81% of adults in 21029 hold a bachelor's degree, about 53 points above the U.S. average of 28%.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 21029, MD sits in the top quarter nationally on this measure.
Why turnout in 21029 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 21029 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 77%, about 17 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 93% of households in 21029 own their home, about 18 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 99% of adults in 21029 have completed high school, above 96% 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.