21711 is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 88% of adults in 21711 typically vote, above the U.S. average of about 62%. Among adults in 21711, ~16% vote Democratic, ~72% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 21711 compares
Among zip codes within 15 miles, 21711 leans more Republican than 12 of 15 neighbors.
21711 runs about 92 points more Republican than Maryland as a whole. Maryland leans Democratic overall, while 21711 is one of the few Republican-leaning pockets.
Why 21711 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 21711, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 21711, about 98% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 19 points below the Maryland average of 38%. Car-dependent areas vote Republican, and about 84% of residents in 21711 drive to work alone, above 83% of zip codes. 21711 runs against the grain of Maryland, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 21711, MD sits in the bottom 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 21711 looks the way it does
Homeowners vote more often than renters. About 97% of households in 21711 own their home, about 20 points above the Maryland average of 77%. 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.