Cowlitz County leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 74% of adults in Cowlitz County typically vote, above the U.S. average of about 62%. Among adults in Cowlitz County, ~30% vote Democratic, ~44% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Cowlitz County compares
Among counties within 50 miles, Cowlitz County leans more Republican than 4 of 7 neighbors.
Cowlitz County runs about 36 points more Republican than Washington as a whole. Washington leans Democratic overall, while Cowlitz County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Cowlitz County. The northeast side is the most Republican-leaning (R+38) and the southwest side is the least Republican-leaning (R+6), a spread of about 32 points.
Why Cowlitz County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Cowlitz County, not a ranked or complete list of what matters most.
Cowlitz County votes Republican even though it is densely developed (about 60%, well above the Washington average of 41%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Cowlitz County runs against the grain of Washington, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Cowlitz County, WA sits in the top quarter 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 Cowlitz County looks the way it does
Turnout in Cowlitz County 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 Counties
- Columbia County, OR R+18
- Wahkiakum County, WA R+19
- Lewis County, WA R+29
- Clark County, WA D+7
- Washington County, OR D+32
- Multnomah County, OR D+52
- Clatsop County, OR D+6
- Pacific County, WA R+5
- Clackamas County, OR D+13
- Skamania County, WA R+13
Counties with Similar Populations
- Hardin County, KY R+27
- Mercer County, PA R+27
- Androscoggin County, ME R+12
- Douglas County, OR R+29
- Craighead County, AR R+27
- Hanover County, VA R+21
- LaSalle County, IL R+21
- Warren County, NJ R+16
- Terrebonne Parish, LA R+42
- Delaware County, IN R+11
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.