Maple Valley leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 90% of adults in Maple Valley typically vote, above the U.S. average of about 62%. Among adults in Maple Valley, ~52% vote Democratic, ~38% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Maple Valley compares
Among cities within 25 miles, Maple Valley leans more Democratic than 45 of 87 neighbors.
Politically, Maple Valley sits close to the rest of Washington.
Politics vary noticeably by neighborhood within Maple Valley. The south side is the most Democratic-leaning (D+23) and the northwest side is the least Democratic-leaning (D+5), a spread of about 19 points.
Why Maple Valley 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 Maple Valley, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 75% of residents in Maple Valley live in densely developed areas, about 39 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Maple Valley sits in the top quarter (about 49%, above 93% of cities).
Population density and Democratic lean
Places with high population density tend to lean Democratic; Maple Valley, WA sits in the top tenth nationally on this measure.
Why turnout in Maple Valley looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Maple Valley 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Maple Valley have completed high school, above 84% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hobart, WA D+4
- Covington, WA D+11
- Lake Morton-Berrydale, WA D+6
- Black Diamond, WA D+12
- Ravensdale, WA R+8
- Kummer, WA D+8
- Kanaskat, WA R+7
- Kangley, WA R+19
- East Hill-Meridian, WA D+24
- Fairwood, WA D+31
Cities with Similar Populations
- Shenandoah, FL R+15
- Suisun City, CA D+27
- Oakleaf Plantation, FL D+7
- Franconia, VA D+46
- Ferry Pass, FL R+15
- Garfield Heights, OH D+52
- West Warwick, RI D+6
- Galloway, OH R+7
- Flemington, NJ Even
- Ridgecrest, CA R+25
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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.