Oldham County is a Republican stronghold. About 10% of voters here vote Democratic and 90% Republican.
About 68% of adults in Oldham County typically vote, above the U.S. average of about 62%. Among adults in Oldham County, ~7% vote Democratic, ~61% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Oldham County compares
Among counties within 50 miles, Oldham County is the most Republican-leaning.
Oldham County runs about 66 points more Republican than Texas as a whole.
Politics vary noticeably by city within Oldham County. The west side is the most Republican-leaning (R+88) and the south side is the least Republican-leaning (R+74), a spread of about 14 points.
Why Oldham 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 Oldham County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 78% of households in Oldham County are family households, about 11 points above the U.S. average of 67%.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as Oldham County, TX does.
Why turnout in Oldham County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Oldham County 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 Counties
- Randall County, TX R+46
- Deaf Smith County, TX R+30
- Potter County, TX R+19
- Hartley County, TX R+76
- Moore County, TX R+32
- Castro County, TX R+40
- Parmer County, TX R+50
- Dallam County, TX R+46
- Armstrong County, TX R+77
- Hutchinson County, TX R+60
Counties with Similar Populations
- Cheyenne County, CO R+72
- Dickens County, TX R+72
- Golden Valley County, ND R+69
- McCone County, MT R+72
- Hodgeman County, KS R+77
- Steele County, ND R+33
- Boyd County, NE R+75
- Garfield County, NE R+66
- De Baca County, NM R+35
- Powder River County, MT R+72
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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.