Mount Vernon leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 69% of adults in Mount Vernon typically vote, above the U.S. average of about 62%. Among adults in Mount Vernon, ~38% vote Democratic, ~31% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Mount Vernon compares
Among cities within 25 miles, Mount Vernon leans more Democratic than 41 of 52 neighbors.
Mount Vernon runs about 8 points more Republican than Washington as a whole.
Politics vary noticeably by neighborhood within Mount Vernon. The west side runs the most Democratic (D+14) and the southeast side runs the most Republican (R+5), a spread of about 19 points.
Why Mount Vernon 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 Mount Vernon, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 67% of residents in Mount Vernon live in densely developed areas, about 31 points above the U.S. average of 36%.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Mount Vernon, 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 Mount Vernon looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Mount Vernon is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Big Lake, WA D+3
- Clear Lake, WA R+17
- Burlington, WA Even
- Sterling, WA R+10
- Conway, WA R+5
- Rexville, WA D+9
- Lake McMurray, WA R+5
- Bay View, WA R+12
- Sedro-Woolley, WA R+13
- La Conner, WA D+25
Cities with Similar Populations
- Spring Hill, TN R+34
- Newark, CA D+35
- Lake City, FL R+43
- Los Banos, CA D+5
- Donna, TX Even
- Beavercreek, OH R+11
- Zanesville, OH R+30
- Chillicothe, OH R+36
- Elmhurst, IL D+18
- Benton, AR R+39
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.