Peoria leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 83% of adults in Peoria typically vote, above the U.S. average of about 62%. Among adults in Peoria, ~29% vote Democratic, ~54% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Peoria compares
Among cities within 25 miles, Peoria leans more Republican than 28 of 52 neighbors.
Peoria runs about 44 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Peoria is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Peoria. The southeast side is the most Republican-leaning (R+51) and the northwest side is the least Republican-leaning (R+20), a spread of about 31 points.
Why Peoria 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 Peoria, not a ranked or complete list of what matters most.
Peoria votes against the grain of Oregon. Oregon leans Democratic overall, while Peoria runs about 44 points more Republican.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as Peoria, OR does.
Why turnout in Peoria looks the way it does
Turnout in Peoria 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
- Oakville, OR R+36
- Shedd, OR R+51
- Halsey, OR R+56
- Miller, OR R+54
- Bellfountain, OR R+15
- Orleans, OR R+13
- Monroe, OR R+18
- Corvallis, OR D+54
- Philomath, OR D+26
- Tangent, OR R+33
Cities with Similar Populations
- Gatzke, MN R+40
- Worthen, AR R+62
- Thackeray, IL R+71
- Howard, NY R+52
- Neuse Forest, NC R+30
- Nelson, NH D+6
- Dexter, IN R+52
- Weott, CA D+21
- Hennepin, OK R+65
- Wallace, KS R+85
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.