Denison leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 89% of adults in Denison typically vote, above the U.S. average of about 62%. Among adults in Denison, ~26% vote Democratic, ~63% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Denison compares
Among cities within 25 miles, Denison leans more Republican than 31 of 41 neighbors.
Denison runs about 59 points more Republican than Washington as a whole. Washington leans Democratic overall, while Denison is one of the few Republican-leaning pockets.
Why Denison 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 Denison, not a ranked or complete list of what matters most.
Denison votes against the grain of Washington. Washington leans Democratic overall, while Denison runs about 59 points more Republican. A high family-household share predicts Republican voting, and about 75% of households in Denison are family households, above 75% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Denison, WA sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Denison looks the way it does
Homeowners vote more often than renters. About 93% of households in Denison own their home, about 20 points above the Washington average of 73%. High high-school completion lines up with higher turnout, and about 98% of adults in Denison have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Deer Park, WA R+38
- Colbert, WA R+31
- Chattaroy, WA R+40
- Milan, WA R+45
- Nine Mile Falls, WA R+38
- Mead, WA R+27
- Clayton, WA R+49
- Green Bluff, WA R+36
- Country Homes, WA D+5
- Tumtum, WA R+46
Cities with Similar Populations
- Cienega Springs, AZ R+43
- Blossom, TX R+79
- Gum Spring, VA R+32
- McDonalds Mill, VA R+34
- Grimsley, TN R+70
- Claude, TX R+76
- Stockton, KS R+58
- Washburn, ME R+41
- Soldiers Grove, WI R+20
- Paradise, UT R+63
All Local Stats
Home Services
Sources and methodology
Precinct-level voting records used to fit the model come from Washington Secretary of State, Elections, 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.