Oldham leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 88% of adults in Oldham typically vote, above the U.S. average of about 62%. Among adults in Oldham, ~32% vote Democratic, ~56% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How Oldham compares
Among cities within 25 miles, Oldham leans more Republican than 9 of 56 neighbors.
Oldham runs about 9 points more Republican than Missouri as a whole.
Politics vary noticeably by neighborhood within Oldham. The southeast side is the most Republican-leaning (R+57) and the west side is the least Republican-leaning (R+22), a spread of about 35 points.
Why Oldham leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Oldham. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Oldham, MO sits in the top 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 Oldham looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Oldham is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Oldham have completed high school, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hartsburg, MO R+26
- Ashland, MO R+22
- Englewood, MO R+29
- Wilton, MO R+23
- Lake Mykee Town, MO R+57
- Elkhurst, MO R+27
- Cedar City, MO R+43
- New Bloomfield, MO R+57
- Holts Summit, MO R+46
- Marion, MO R+57
Cities with Similar Populations
- McElhattan, PA R+48
- Soldier Pond, ME R+41
- Lagunitas, CA D+63
- Johnsburg, NY R+15
- Roberts Corners, MI R+39
- Gum Branch, NC R+44
- Victory, NY R+14
- Gordon, OH R+60
- Tres Pinos, CA R+35
- Russell, MN R+57
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri Secretary of State, Elections, 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.