Steilacoom leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 73% of adults in Steilacoom typically vote, above the U.S. average of about 62%. Among adults in Steilacoom, ~47% vote Democratic, ~26% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Steilacoom compares
Among cities within 25 miles, Steilacoom leans more Democratic than 65 of 77 neighbors.
Steilacoom runs about 11 points more Democratic than Washington as a whole.
Politics vary noticeably by neighborhood within Steilacoom. The north side is the most Democratic-leaning (D+40) and the south side is the least Democratic-leaning (D+23), a spread of about 18 points.
Why Steilacoom 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 Steilacoom, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 66% of residents in Steilacoom live in densely developed areas, about 30 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Steilacoom sits in the top quarter (about 45%, above 91% of cities).
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Steilacoom, WA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Steilacoom looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Steilacoom 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.
Nearby Cities
- Lakewood, WA D+24
- North Fort Lewis, WA R+5
- University Place, WA D+29
- Tillicum, WA R+12
- Anderson Island, WA D+13
- Fort Lewis, WA Even
- Fircrest, WA D+34
- Fox Island, WA D+6
- Dupont, WA D+13
- Parkland, WA D+16
Cities with Similar Populations
- Jim Thorpe, PA R+25
- South Lebanon, OH R+33
- Walkerton, IN R+43
- Prairie du Chien, WI R+21
- Brookville, PA R+49
- Inverness, IL D+7
- Strathmore, NJ R+11
- Lake Carmel, NY R+17
- Pine Ridge, FL R+44
- Baltimore Highlands, MD D+12
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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.