20912 is a Democratic stronghold. About 89% of voters here vote Democratic and 11% Republican.
About 59% of adults in 20912 typically vote, near the U.S. average of about 62%. Among adults in 20912, ~52% vote Democratic, ~7% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 20912 compares
Among zip codes within 15 miles, 20912 leans more Democratic than 102 of 124 neighbors.
20912 runs about 49 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 20912. The south side is the most Democratic-leaning (D+86) and the northeast side is the least Democratic-leaning (D+67), a spread of about 19 points.
Why 20912 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 20912, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 20912 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 20912 sits in the top quarter (about 50%, above 89% of zip codes). A high never-married share predicts Democratic voting, and about 38% of adults in 20912 have never been married, above 85% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 20912, 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 20912 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 20912 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 54% of households in 20912 rent, about 29 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 21% of adults in 20912 report food insecurity, 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.