Preston leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About more than 99% of adults in Preston typically vote, above the U.S. average of about 62%. Among adults in Preston, ~69% vote Democratic, ~39% Republican, and ~-8% don't vote. The map below shows estimated turnout by block group.
How Preston compares
Among cities within 25 miles, Preston leans more Democratic than 46 of 84 neighbors.
Preston runs about 9 points more Democratic than Washington as a whole.
Why Preston 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 Preston, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in Preston hold a bachelor's degree, about 43 points above the U.S. average of 28%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Preston, 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 Preston looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Preston 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 78%, about 18 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 98% of households in Preston own their home, about 23 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Preston have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fall City, WA D+23
- Upper Preston, WA D+29
- Klahanie, WA D+42
- Snoqualmie, WA D+31
- Spring Glen, WA D+25
- Issaquah, WA D+42
- Sammamish, WA D+38
- Carnation, WA D+16
- Ellisville, WA D+16
- North Bend, WA D+21
Cities with Similar Populations
- Brighton Beach, SC R+29
- Poynor, TX R+44
- Palmer, IL R+59
- Silver City, NC D+7
- Orrs Island, ME D+37
- Fairview, WY R+79
- Hewlett Neck, NY R+45
- Lytton, OH R+50
- DeTour Village, MI R+25
- Gnaw Bone, IN R+41
All Local Stats
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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.