Denison leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 64% of adults in Denison typically vote, near the U.S. average of about 62%. Among adults in Denison, ~20% vote Democratic, ~44% Republican, and ~36% 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 1 of 63 neighbors.
Denison runs about 23 points more Republican than Texas as a whole.
Politics vary noticeably by neighborhood within Denison. The southeast side is the most Republican-leaning (R+54) and the north side is the least Republican-leaning (R+26), a spread of about 29 points.
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 Republican even though it is densely developed (about 56%, well above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Denison, TX sits in the bottom 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
Areas with limited routine healthcare access turn out at lower rates. Denison is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Sherman Junction, TX R+59
- Knollwood, TX R+42
- Penland, TX R+72
- Smith Oaks, TX R+69
- Colbert, OK R+62
- Sherman, TX R+26
- Pottsboro, TX R+60
- Cartwright, OK R+66
- Preston, TX R+63
- Achille, OK R+70
Cities with Similar Populations
- Grand Haven, MI R+10
- Elmira, NY D+3
- Coventry, RI R+4
- Tewksbury, MA Even
- Shaker Heights, OH D+72
- Oceanside, NY R+17
- O'Fallon, IL D+8
- Ponchatoula, LA R+51
- Henderson, NC D+28
- Newtown, PA D+7
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Texas 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.