District of Columbia Political Map | Democrat & Republican Areas in District of Columbia

By the BestNeighborhood data science team. Last updated May 2026.

District of Columbia is a Democratic stronghold. About 90% of voters here vote Democratic and 10% Republican.

 

About 67% of adults in the District of Columbia typically vote, near the U.S. average of about 62%. Among adults in the District of Columbia, ~60% vote Democratic, ~7% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.

How District of Columbia compares

Among states within 500 miles, District of Columbia is the most Democratic-leaning.

Politics vary noticeably by county within District of Columbia. The northeast side is the most Democratic-leaning (D+88) and the southwest side is the least Democratic-leaning (D+63), a spread of about 25 points.

Why District of Columbia leans the way it does

This analysis examined 14,881 data points per state to find what predicts political lean and turnout. The items below are a few correlations that stood out for District of Columbia, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 96% of residents in the District of Columbia live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and District of Columbia sits in the top quarter (about 63%, in the top fraction of states). A high never-married share predicts Democratic voting, and about 55% of adults in the District of Columbia have never been married, in the top fraction of states.

Population density and Democratic lean

Places with high population density tend to lean Democratic; District of Columbia sits in the top tenth nationally on this measure.

Why turnout in District of Columbia looks the way it does

Areas with strong routine healthcare access turn out at higher rates. District of Columbia 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.

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.