Tukwila leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 49% of adults in Tukwila typically vote, below the U.S. average of about 62%. Among adults in Tukwila, ~34% vote Democratic, ~15% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How Tukwila compares
Among cities within 25 miles, Tukwila leans more Democratic than 88 of 111 neighbors.
Tukwila runs about 20 points more Democratic than Washington as a whole.
Politics vary noticeably by neighborhood within Tukwila. The southeast side is the most Democratic-leaning (D+48) and the northwest side is the least Democratic-leaning (D+30), a spread of about 18 points.
Why Tukwila leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Tukwila, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Tukwila live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 41% of adults in Tukwila have never been married, above 94% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Tukwila, WA sits in the top tenth nationally on this measure.
Why turnout in Tukwila looks the way it does
Renters vote less often than owners. About 59% of households in Tukwila rent, about 34 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Bryn Mawr-Skyway, WA D+48
- SeaTac, WA D+37
- Boulevard Park, WA D+34
- Burien, WA D+38
- White Center, WA D+42
- Normandy Park, WA D+30
- Renton, WA D+33
- Des Moines, WA D+31
- East Hill-Meridian, WA D+24
- Newcastle, WA D+43
Cities with Similar Populations
- Willow Spring, NC R+24
- White Oak, MD D+63
- Somerville, NJ D+12
- Scarborough, ME D+21
- Westlake Village, CA D+12
- Henderson, TX R+43
- Troy, MO R+45
- Pleasant Prairie, WI R+7
- Mountain Home, ID R+44
- South Burlington, VT D+37
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.