Capitol Hill, Seattle, WA Political Map | Democrat & Republican Areas in Capitol Hill

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

Capitol Hill is a Democratic stronghold. About 90% of voters here vote Democratic and 10% Republican.

 

About 66% of adults in Capitol Hill typically vote, near the U.S. average of about 62%. Among adults in Capitol Hill, ~59% vote Democratic, ~7% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.

How Capitol Hill compares

Among neighborhoods within 5 miles, Capitol Hill leans more Democratic than 31 of 38 neighbors.

Capitol Hill runs about 61 points more Democratic than Washington as a whole.

Politics vary noticeably by block within Capitol Hill. The east side is the most Democratic-leaning (D+85) and the southwest side is the least Democratic-leaning (D+72), a spread of about 13 points.

Why Capitol Hill leans the way it does

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

Areas with high college attainment vote Democratic. About 75% of adults in Capitol Hill hold a bachelor's degree, about 47 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 62% of adults in Capitol Hill have never been married, above 94% of neighborhoods.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Capitol Hill, Seattle, WA sits in the top tenth 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 Capitol Hill looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Capitol Hill 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in Capitol Hill have completed high school, above 88% of neighborhoods. 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 Washington Secretary of State, 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.