20710 is a Democratic stronghold. About 85% of voters here vote Democratic and 15% Republican.
About 39% of adults in 20710 typically vote, below the U.S. average of about 62%. Among adults in 20710, ~33% vote Democratic, ~6% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 20710 compares
Among zip codes within 15 miles, 20710 leans more Democratic than 75 of 119 neighbors.
20710 runs about 41 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 20710. The east side is the most Democratic-leaning (D+75) and the southwest side is the least Democratic-leaning (D+59), a spread of about 16 points.
Why 20710 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 20710, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 20710 live in densely developed areas, about 62 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in 20710 have never been married, above 90% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 20710, MD sits in the top tenth nationally on this measure.
Why turnout in 20710 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 20710 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 21%, about 13 points above the Maryland average of 8%. Renters vote less often than owners, and about 70% of households in 20710 rent, compared to around 54% in nearby zip codes. High food insecurity lines up with lower turnout, and about 34% of adults in 20710 report food insecurity, 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.