Brentwood-Darlington leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 61% of adults in Brentwood-Darlington typically vote, near the U.S. average of about 62%. Among adults in Brentwood-Darlington, ~42% vote Democratic, ~20% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Brentwood-Darlington compares
Among neighborhoods within 5 miles, Brentwood-Darlington leans more Democratic than 10 of 32 neighbors.
Brentwood-Darlington runs about 22 points more Democratic than Oregon as a whole.
Politics vary noticeably by block within Brentwood-Darlington. The northwest side is the most Democratic-leaning (D+44) and the south side is the least Democratic-leaning (D+29), a spread of about 15 points.
Why Brentwood-Darlington leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Brentwood-Darlington, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Brentwood-Darlington live in densely developed areas, about 64 points above the U.S. average of 36%.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Brentwood-Darlington, Portland, OR sits in the top quarter nationally on this measure.
Why turnout in Brentwood-Darlington looks the way it does
Turnout in Brentwood-Darlington 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 Neighborhoods
Neighborhoods with Similar Populations
- Allied Gardens, San Diego, CA D+25
- Mandarin, Jacksonville, FL R+38
- South Knoxville, Knoxville, TN D+19
- Memorial Park, Santa Ana, CA D+31
- Saint Anthony, St. Paul, MN D+73
- Elk Plain, Spanaway, WA R+13
- Thunderbird Hills, San Antonio, TX D+23
- Liberty Street Historic District, San Francisco, CA D+81
- Willowbrook, Houston, TX D+28
- North End, Fall River, MA D+4
All Local Stats
Home Services
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.