Forest Grove leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 66% of adults in Forest Grove typically vote, near the U.S. average of about 62%. Among adults in Forest Grove, ~36% vote Democratic, ~30% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Forest Grove compares
Among cities within 25 miles, Forest Grove leans more Democratic than 40 of 60 neighbors.
Forest Grove runs about 4 points more Republican than Oregon as a whole.
Politics vary noticeably by neighborhood within Forest Grove. The east side runs the most Democratic (D+20) and the northeast side runs the most Republican (R+20), a spread of about 40 points.
Why Forest Grove 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 Forest Grove, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 64% of residents in Forest Grove live in densely developed areas, about 27 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Forest Grove sits in the top quarter (about 33%, above 78% of cities). A high never-married share predicts Democratic voting, and about 36% of adults in Forest Grove have never been married, above 89% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Forest Grove, OR sits in the top tenth nationally on this measure.
Why turnout in Forest Grove looks the way it does
Turnout in Forest Grove 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
- Cornelius, OR D+9
- Cove Orchard, OR R+20
- Mountaindale, OR R+5
- Greenville, OR R+35
- Glenwood, OR R+25
- Schefflin, OR R+29
- Gaston, OR R+14
- Banks, OR R+13
- Laurelwood, OR R+8
- North Plains, OR Even
Cities with Similar Populations
- Woodway, TX R+30
- Deer Park, NY R+5
- West Springfield Town, MA D+5
- Kingsville, TX R+4
- Smithtown, NY R+27
- South Bradenton, FL R+8
- Rahway, NJ D+37
- Marshall, TX R+7
- Corbin, KY R+60
- Gulf Breeze, FL R+43
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.