Mountlake Terrace leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 66% of adults in Mountlake Terrace typically vote, near the U.S. average of about 62%. Among adults in Mountlake Terrace, ~42% vote Democratic, ~24% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Mountlake Terrace compares
Among cities within 25 miles, Mountlake Terrace leans more Democratic than 43 of 90 neighbors.
Mountlake Terrace runs about 9 points more Democratic than Washington as a whole.
Why Mountlake Terrace 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 Mountlake Terrace, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in Mountlake Terrace live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Mountlake Terrace sits in the top quarter (about 44%, above 90% of cities). A high never-married share predicts Democratic voting, and about 35% of adults in Mountlake Terrace have never been married, above 87% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Mountlake Terrace, 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 Mountlake Terrace looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Mountlake Terrace 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Brier, WA D+21
- Lake Forest Park, WA D+56
- Edmonds, WA D+30
- Shoreline, WA D+48
- Lynnwood, WA D+21
- Bothell West, WA D+23
- Woodway, WA D+11
- Kenmore, WA D+46
- North Lynnwood, WA D+28
- Bothell, WA D+29
Cities with Similar Populations
- Millersville, MD D+13
- Jasper, IN R+40
- East Providence, RI D+12
- Altamont, OR R+35
- Silverdale, WA D+9
- Stanford, CA D+64
- South St. Paul, MN D+18
- Meadowbrook, VA D+45
- Abbeville, LA R+29
- Deming, NM R+17
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.