Tiller leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 39% of adults in Tiller typically vote, below the U.S. average of about 62%. Among adults in Tiller, ~12% vote Democratic, ~27% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How Tiller compares
Among cities within 25 miles, Tiller leans more Republican than 5 of 13 neighbors.
Tiller runs about 50 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Tiller is one of the few Republican-leaning pockets.
Why Tiller 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 Tiller, not a ranked or complete list of what matters most.
Tiller votes against the grain of Oregon. Oregon leans Democratic overall, while Tiller runs about 50 points more Republican. Rural areas vote Republican, and Tiller sits in the bottom quarter on density (about 3%, below 91% of cities). Low college attainment predicts Republican voting, and Tiller sits in the bottom quarter (about 14%, below 82% of cities).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Tiller, OR sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Tiller looks the way it does
Renters vote less often than owners. About 56% of households in Tiller rent, about 31 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Days Creek, OR R+40
- Azalea, OR R+41
- Trail, OR R+39
- Canyonville, OR R+28
- Quines Creek, OR R+39
- Myrtle Creek, OR R+33
- Surprise Valley, OR R+37
- Shady Cove, OR R+27
- Peel, OR R+35
- Tri-City, OR R+40
Cities with Similar Populations
- Sugar Grove, WV R+62
- Cyclone, WV R+81
- South Rutland, NY R+37
- Rodman, SC R+38
- Gifford, PA R+44
- Forest, NC R+58
- Glen Rogers, WV R+77
- Glen, MT R+50
- Hickory Grove, PA R+44
- Cove Neck, NY R+13
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.