Custer County leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 56% of adults in Custer County typically vote, below the U.S. average of about 62%. Among adults in Custer County, ~14% vote Democratic, ~42% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How Custer County compares
Among counties within 50 miles, Custer County is the least Republican-leaning.
Politically, Custer County sits close to the rest of Oklahoma.
Politics vary noticeably by city within Custer County. The northwest side is the most Republican-leaning (R+78) and the south side is the least Republican-leaning (R+26), a spread of about 51 points.
Why Custer County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Custer County, not a ranked or complete list of what matters most.
Custer County votes Republican even though it is densely developed (about 57%, far above the Oklahoma average of 18%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Never-married share, developed land, and voter turnout
Places that combine a never-married-heavy adult population and a heavily developed built environment tend to turn out at a lower rate, as Custer County, OK does.
Why turnout in Custer County looks the way it does
Renters vote less often than owners. About 39% of households in Custer County rent, about 14 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Washita County, OK R+74
- Blaine County, OK R+60
- Caddo County, OK R+54
- Dewey County, OK R+78
- Beckham County, OK R+67
- Kiowa County, OK R+61
- Roger Mills County, OK R+83
- Major County, OK R+73
- Greer County, OK R+67
- Kingfisher County, OK R+64
Counties with Similar Populations
- Marion County, MO R+44
- Perry County, KY R+61
- Cass County, TX R+56
- Carroll County, TN R+58
- Sanpete County, UT R+63
- Lincoln County, WI R+29
- Palo Pinto County, TX R+62
- Copiah County, MS D+6
- Elmore County, ID R+42
- Stoddard County, MO R+62
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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.