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

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

Tigard leans heavily Democratic by roughly 40 points: about 70% of voters vote Democratic and 30% Republican.

 

About 77% of adults in Tigard typically vote, above the U.S. average of about 62%. Among adults in Tigard, ~54% vote Democratic, ~23% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.

How Tigard compares

Among cities within 25 miles, Tigard leans more Democratic than 95 of 100 neighbors.

Tigard runs about 26 points more Democratic than Oregon as a whole.

Politics vary noticeably by neighborhood within Tigard. The northeast side is the most Democratic-leaning (D+51) and the southwest side is the least Democratic-leaning (D+35), a spread of about 16 points.

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

Dense areas vote Democratic. About 98% of residents in Tigard live in densely developed areas, about 61 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Tigard sits in the top quarter (about 50%, above 93% of cities).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Tigard, OR sits in the top tenth 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 Tigard looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Tigard 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.

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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.