Mill Creek leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 82% of adults in Mill Creek typically vote, above the U.S. average of about 62%. Among adults in Mill Creek, ~51% vote Democratic, ~31% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Mill Creek compares
Among cities within 25 miles, Mill Creek leans more Democratic than 40 of 80 neighbors.
Mill Creek runs about 6 points more Democratic than Washington as a whole.
Politics vary noticeably by neighborhood within Mill Creek. The northwest side is the most Democratic-leaning (D+36) and the north side is the least Democratic-leaning (D+19), a spread of about 17 points.
Why Mill Creek 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 Mill Creek, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 88% of residents in Mill Creek live in densely developed areas, about 52 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Mill Creek sits in the top quarter (about 57%, above 96% of cities).
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Mill Creek, WA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Mill Creek looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Mill Creek 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Mill Creek have completed high school, above 84% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Mill Creek East, WA D+23
- Eastmont, WA D+7
- Silver Firs, WA D+9
- Lake Stickney, WA D+20
- North Lynnwood, WA D+28
- Clearview, WA D+17
- Lynnwood, WA D+21
- Bothell West, WA D+23
- Everett, WA D+17
- Bothell, WA D+29
Cities with Similar Populations
- Lino Lakes, MN R+9
- Beaufort, SC R+2
- Dripping Springs, TX R+18
- Liberal, KS R+25
- Alpine, CA R+30
- East Hemet, CA R+12
- Olivehurst, CA R+11
- Five Corners, WA Even
- Temperance, MI R+27
- Pendleton, OR R+29
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.