Troutdale, OR Political Map | Democrat & Republican Areas in Troutdale

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

Troutdale leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.

 

About 78% of adults in Troutdale typically vote, above the U.S. average of about 62%. Among adults in Troutdale, ~43% vote Democratic, ~35% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.

How Troutdale compares

Among cities within 25 miles, Troutdale leans more Democratic than 41 of 72 neighbors.

Politically, Troutdale sits close to the rest of Oregon.

Politics vary noticeably by neighborhood within Troutdale. The northwest side runs the most Democratic (D+19) and the southeast side runs the most Republican (Even), a spread of about 19 points.

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

Dense areas vote Democratic. About 80% of residents in Troutdale live in densely developed areas, about 44 points above the U.S. average of 36%.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Troutdale, OR 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 Troutdale looks the way it does

Turnout in Troutdale 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 Oregon Secretary of State, Elections Division, 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.