Cosmopolis leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 78% of adults in Cosmopolis typically vote, above the U.S. average of about 62%. Among adults in Cosmopolis, ~32% vote Democratic, ~46% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Cosmopolis compares
Among cities within 25 miles, Cosmopolis leans more Republican than 19 of 43 neighbors.
Cosmopolis runs about 36 points more Republican than Washington as a whole. Washington leans Democratic overall, while Cosmopolis is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Cosmopolis. The east side is the most Republican-leaning (R+33) and the north side is the least Republican-leaning (R+12), a spread of about 22 points.
Why Cosmopolis 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 Cosmopolis, not a ranked or complete list of what matters most.
Cosmopolis votes Republican even though it is densely developed (about 42%, about 6 points above the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Cosmopolis runs against the grain of Washington, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Cosmopolis, WA sits in the top quarter 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 Cosmopolis looks the way it does
Turnout in Cosmopolis sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- South Aberdeen, WA R+23
- Junction City, WA R+18
- Aberdeen, WA Even
- Central Park, WA R+18
- South Montesano, WA R+15
- Woodlawn, WA R+16
- Montesano, WA R+13
- Hoquiam, WA R+5
- Markham, WA R+30
Cities with Similar Populations
- Waverly, GA R+52
- Maple, OK R+67
- Daniel, UT R+40
- Bluford, IL R+68
- Tetonia, ID R+36
- Noble, LA R+51
- Westmoreland, NY R+35
- Hadley, PA R+58
- Tabor, IA R+46
- Glasgow, MO R+48
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.