South Scappoose leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 76% of adults in South Scappoose typically vote, above the U.S. average of about 62%. Among adults in South Scappoose, ~36% vote Democratic, ~40% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How South Scappoose compares
Among cities within 25 miles, South Scappoose leans more Republican than 25 of 66 neighbors.
South Scappoose runs about 19 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while South Scappoose is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within South Scappoose. The southeast side runs the most Democratic (D+26) and the south side runs the most Republican (R+13), a spread of about 39 points.
Why South Scappoose 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 South Scappoose, not a ranked or complete list of what matters most.
South Scappoose votes against the grain of Oregon. Oregon leans Democratic overall, while South Scappoose runs about 19 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; South Scappoose, 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 South Scappoose looks the way it does
Turnout in South Scappoose 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 Cities
- Scappoose, OR R+10
- Holbrook, OR D+29
- Warren, OR R+16
- Sara, WA R+7
- St. Helens, OR R+9
- Linnton, OR D+28
- Yankton, OR R+24
- North Plains, OR Even
- Ridgefield, WA R+5
- Columbia City, OR R+22
Cities with Similar Populations
- Mooreland, IN R+56
- Imler, PA R+73
- Altamont, TN R+73
- Rhodhiss, NC R+50
- Raymond, IL R+48
- Weleetka, OK R+48
- Eastport, ME D+22
- Eudora, MS R+66
- Sewickley Hills, PA R+2
- Valentine, IN R+63
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.