Clackamas leans Democratic by roughly 18 points: about 59% of voters vote Democratic and 41% Republican.
About 69% of adults in Clackamas typically vote, above the U.S. average of about 62%. Among adults in Clackamas, ~41% vote Democratic, ~28% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Clackamas compares
Among cities within 25 miles, Clackamas leans more Democratic than 57 of 84 neighbors.
Politically, Clackamas sits close to the rest of Oregon.
Politics vary noticeably by neighborhood within Clackamas. The northwest side is the most Democratic-leaning (D+33) and the south side is the least Democratic-leaning (D+7), a spread of about 27 points.
Why Clackamas 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 Clackamas, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 86% of residents in Clackamas live in densely developed areas, about 50 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Clackamas sits in the top quarter (about 34%, above 81% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Clackamas, 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 Clackamas looks the way it does
Turnout in Clackamas 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
- Happy Valley, OR D+20
- Johnson City, OR D+8
- Oatfield, OR D+24
- Damascus, OR R+6
- Gladstone, OR D+17
- Milwaukie, OR D+39
- Oak Grove, OR D+37
- Marylhurst, OR D+34
- Oregon City, OR Even
- West Linn, OR D+33
Cities with Similar Populations
- Highland, IN Even
- Green Valley, AZ D+3
- Miami Springs, FL R+20
- Loves Park, IL R+3
- Canby, OR Even
- Menomonie, WI Even
- Biddeford, ME D+12
- Millbrae, CA D+40
- Brainerd, MN R+27
- Tullahoma, TN R+47
All Local Stats
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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.