20018 is a Democratic stronghold. About 93% of voters here vote Democratic and 7% Republican.
About 74% of adults in 20018 typically vote, above the U.S. average of about 62%. Among adults in 20018, ~69% vote Democratic, ~5% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 20018 compares
Among zip codes within 15 miles, 20018 is the most Democratic-leaning.
Politically, 20018 sits close to the rest of the District of Columbia.
Why 20018 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 20018, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in 20018 live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 20018 sits in the top quarter (about 45%, above 85% of zip codes). A high never-married share predicts Democratic voting, and about 46% of adults in 20018 have never been married, above 93% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 20018, DC sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 20018 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 20018 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 66%, about 6 points above the U.S. average of 60%. 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 District of Columbia 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.