Sumner is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 72% of adults in Sumner typically vote, above the U.S. average of about 62%. Among adults in Sumner, ~13% vote Democratic, ~59% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Sumner compares
Among cities within 25 miles, Sumner leans more Republican than 16 of 23 neighbors.
Sumner runs about 15 points more Republican than Oklahoma as a whole.
Politics vary noticeably by neighborhood within Sumner. The southwest side is the most Republican-leaning (R+67) and the north side is the least Republican-leaning (R+31), a spread of about 36 points.
Why Sumner 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 Sumner, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 77% of households in Sumner are family households, about 10 points above the U.S. average of 67%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; Sumner, OK sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Sumner looks the way it does
Areas with high high-school completion turn out at higher rates. About 98% of adults in Sumner have completed high school, about 9 points above the Oklahoma average of 89%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Morrison, OK R+63
- Perry, OK R+52
- Yost, OK R+47
- Stillwater, OK R+6
- Red Rock, OK R+37
- Orlando, OK R+62
- Glencoe, OK R+58
- Watchorn, OK R+60
- Lucien, OK R+67
- Marland, OK R+33
Cities with Similar Populations
- Clementsville, KY R+77
- Blue Springs, NE R+59
- Warm Springs, VA R+51
- Holbrook, NE R+75
- Spratt, MI R+46
- Derby, IA R+52
- Newport, OK R+65
- St. James, IL R+69
- Harris, TN R+65
- Highland Lake, AL R+85
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Sources and methodology
Precinct-level voting records used to fit the model come from Oklahoma State Election Board, 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.