McClain County is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 67% of adults in McClain County typically vote, near the U.S. average of about 62%. Among adults in McClain County, ~13% vote Democratic, ~54% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How McClain County compares
Among counties within 50 miles, McClain County leans more Republican than 8 of 9 neighbors.
McClain County runs about 12 points more Republican than Oklahoma as a whole.
Politics vary noticeably by city within McClain County. The southwest side is the most Republican-leaning (R+72) and the east side is the least Republican-leaning (R+52), a spread of about 20 points.
Why McClain 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 McClain County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 75% of households in McClain County are family households, about 8 points above the U.S. average of 67%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; McClain County, OK sits below the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in McClain County looks the way it does
Turnout in McClain County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Cleveland County, OK R+14
- Grady County, OK R+58
- Garvin County, OK R+61
- Oklahoma County, OK D+6
- Canadian County, OK R+37
- Pottawatomie County, OK R+49
- Caddo County, OK R+54
- Stephens County, OK R+58
- Logan County, OK R+45
- Murray County, OK R+59
Counties with Similar Populations
- Cooke County, TX R+57
- Baxter County, AR R+51
- Wharton County, TX R+33
- Gratiot County, MI R+28
- Oconee County, GA R+41
- Marinette County, WI R+34
- Benton County, MN R+30
- Tift County, GA R+22
- Fayette County, TN R+33
- Tallapoosa County, AL R+39
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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.