20722 is a Democratic stronghold. About 84% of voters here vote Democratic and 16% Republican.
About 45% of adults in 20722 typically vote, below the U.S. average of about 62%. Among adults in 20722, ~38% vote Democratic, ~7% Republican, and ~55% don't vote. The map below shows estimated turnout by block group.
How 20722 compares
Among zip codes within 15 miles, 20722 leans more Democratic than 71 of 120 neighbors.
20722 runs about 39 points more Democratic than Maryland as a whole.
Politics vary noticeably by block within 20722. The northeast side is the most Democratic-leaning (D+76) and the southeast side is the least Democratic-leaning (D+65), a spread of about 11 points.
Why 20722 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 20722, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 91% of residents in 20722 live in densely developed areas, about 55 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 48% of adults in 20722 have never been married, above 94% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 20722, MD sits in the top tenth nationally on this measure.
Why turnout in 20722 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 20722 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 22%, about 14 points above the Maryland average of 8%. Renters vote less often than owners, and about 34% of households in 20722 rent, compared to around 57% in nearby zip codes. High food insecurity lines up with lower turnout, and about 29% of adults in 20722 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.