Polk County is a true toss-up. About 48% of voters here vote Democratic and 52% Republican.
About 73% of adults in Polk County typically vote, above the U.S. average of about 62%. Among adults in Polk County, ~35% vote Democratic, ~38% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Polk County compares
Among counties within 50 miles, Polk County leans more Republican than 5 of 8 neighbors.
Polk County runs about 19 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Polk County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Polk County. The east side runs the most Democratic (D+10) and the north side runs the most Republican (R+30), a spread of about 41 points.
Why Polk County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Polk County, not a ranked or complete list of what matters most.
Polk County votes against the grain of Oregon. Oregon leans Democratic overall, while Polk County runs about 19 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Polk County, 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 Polk County looks the way it does
Turnout in Polk County 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 Counties
- Marion County, OR D+3
- Yamhill County, OR R+5
- Benton County, OR D+42
- Linn County, OR R+25
- Lincoln County, OR D+13
- Washington County, OR D+32
- Clackamas County, OR D+13
- Tillamook County, OR R+9
- Multnomah County, OR D+52
- Lane County, OR D+21
Counties with Similar Populations
- Burke County, NC R+40
- Bannock County, ID R+25
- Cullman County, AL R+76
- Elmore County, AL R+47
- Island County, WA D+10
- Lincoln County, NC R+45
- Josephine County, OR R+25
- Muskingum County, OH R+41
- Angelina County, TX R+41
- Lapeer County, MI R+38
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.