20747 is a Democratic stronghold. About 92% of voters here vote Democratic and 8% Republican.
About 61% of adults in 20747 typically vote, near the U.S. average of about 62%. Among adults in 20747, ~56% vote Democratic, ~5% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 20747 compares
Among zip codes within 15 miles, 20747 leans more Democratic than 91 of 98 neighbors.
20747 runs about 56 points more Democratic than Maryland as a whole.
Why 20747 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 20747, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 93% of residents in 20747 live in densely developed areas, about 57 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 49% of adults in 20747 have never been married, above 95% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 20747, MD sits in the top quarter 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 20747 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 20747 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 46% of households in 20747 rent, about 21 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 29% of adults in 20747 report food insecurity, above 93% 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.