20317 is a Democratic stronghold. About 81% of voters here vote Democratic and 19% Republican.
About 75% of adults in 20317 typically vote, above the U.S. average of about 62%. Among adults in 20317, ~61% vote Democratic, ~14% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How 20317 compares
Among zip codes within 15 miles, 20317 leans more Democratic than 62 of 125 neighbors.
20317 runs about 21 points more Republican than the District of Columbia as a whole.
Why 20317 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 20317, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 20317 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 20317 sits in the top quarter (about 55%, above 92% of zip codes).
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; 20317, DC sits in the top tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 20317 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 20317 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 71%, about 11 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.