Bryn Mawr-Skyway leans heavily Democratic by roughly 48 points: about 74% of voters vote Democratic and 26% Republican.
About 57% of adults in Bryn Mawr-Skyway typically vote, near the U.S. average of about 62%. Among adults in Bryn Mawr-Skyway, ~42% vote Democratic, ~15% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How Bryn Mawr-Skyway compares
Among cities within 25 miles, Bryn Mawr-Skyway leans more Democratic than 102 of 106 neighbors.
Bryn Mawr-Skyway runs about 30 points more Democratic than Washington as a whole.
Politics vary noticeably by neighborhood within Bryn Mawr-Skyway. The north side is the most Democratic-leaning (D+54) and the southeast side is the least Democratic-leaning (D+38), a spread of about 16 points.
Why Bryn Mawr-Skyway 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 Bryn Mawr-Skyway, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in Bryn Mawr-Skyway live in densely developed areas, about 61 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Bryn Mawr-Skyway sits in the top quarter (about 35%, above 82% of cities). A high never-married share predicts Democratic voting, and about 36% of adults in Bryn Mawr-Skyway have never been married, above 89% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Bryn Mawr-Skyway, WA sits in the top tenth nationally on this measure.
Why turnout in Bryn Mawr-Skyway looks the way it does
Renters vote less often than owners. About 41% of households in Bryn Mawr-Skyway rent, about 16 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Tukwila, WA D+38
- Renton, WA D+33
- Boulevard Park, WA D+34
- SeaTac, WA D+37
- Newcastle, WA D+43
- Burien, WA D+38
- White Center, WA D+42
- Mercer Island, WA D+50
- East Renton Highlands, WA D+23
- Fairwood, WA D+31
Cities with Similar Populations
- Seabrook, MD D+69
- Washington Court House, OH R+50
- Chehalis, WA R+27
- Kirksville, MO R+9
- Wexford, PA Even
- Westwood, NJ D+3
- Universal City, TX R+2
- Greenfield, CA D+28
- Caldwell, NJ Even
- Riverton, NJ D+10
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.