Onion Creek, WA Political Map | Democrat & Republican Areas in Onion Creek

By the BestNeighborhood data science team. Last updated May 2026.

Onion Creek leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.

 

About 70% of adults in Onion Creek typically vote, above the U.S. average of about 62%. Among adults in Onion Creek, ~19% vote Democratic, ~51% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.

How Onion Creek compares

Among cities within 25 miles, Onion Creek leans more Republican than 14 of 18 neighbors.

Onion Creek runs about 63 points more Republican than Washington as a whole. Washington leans Democratic overall, while Onion Creek is one of the few Republican-leaning pockets.

Why Onion Creek 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 Onion Creek, not a ranked or complete list of what matters most.

Onion Creek votes against the grain of Washington. Washington leans Democratic overall, while Onion Creek runs about 63 points more Republican. Rural areas vote Republican, and Onion Creek sits in the bottom quarter on density (about 4%, below 86% of cities).

Developed land and Republican lean

Places with a rural land-use pattern tend to lean Republican; Onion Creek, WA sits in the bottom quarter nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.

Why turnout in Onion Creek looks the way it does

Turnout in Onion Creek 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.

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.