Gresham-Southwest leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 69% of adults in Gresham-Southwest typically vote, above the U.S. average of about 62%. Among adults in Gresham-Southwest, ~38% vote Democratic, ~31% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Gresham-Southwest compares
Among neighborhoods within 5 miles, Gresham-Southwest leans more Democratic than 2 of 18 neighbors.
Gresham-Southwest runs about 5 points more Republican than Oregon as a whole.
Politics vary noticeably by block within Gresham-Southwest. The northeast side runs the most Democratic (D+24) and the southwest side runs the most Republican (Even), a spread of about 24 points.
Why Gresham-Southwest leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Gresham-Southwest. The lean here lands roughly where demographic data alone would predict.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as Gresham-Southwest, Gresham, OR does.
Why turnout in Gresham-Southwest looks the way it does
Turnout in Gresham-Southwest 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
- Gresham-Gresham Butte, Gresham, OR D+13
- Gresham-Northwest, Gresham, OR D+24
- Gresham-City Central, Gresham, OR D+35
- Centennial, Portland, OR D+19
- Pleasant Valley, Portland, OR D+21
- Gresham-Rockwood, Gresham, OR D+24
- Gresham-North Central, Gresham, OR D+19
- Gresham-Mt. Hood, Gresham, OR D+5
- Gresham-Northeast, Gresham, OR D+10
- Gresham-Kelly Creek, Gresham, OR D+4
Neighborhoods with Similar Populations
- East Phillips, Minneapolis, MN D+63
- Victoria Gardens, Rancho Cucamonga, CA D+11
- Old Town, Eureka, CA D+38
- Dexter Falls, Columbus, OH D+21
- Seven Bar Ranch, Albuquerque, NM D+21
- Oakhurst, Decatur, GA D+77
- South Hagginwood, Sacramento, CA D+27
- Jacksonville Heights West, Jacksonville, FL D+27
- Apollo Arapaho and Camelot, Garland, TX D+16
- Downtown, Kent, WA D+36
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.