Adair County leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 89% of adults in Adair County typically vote, above the U.S. average of about 62%. Among adults in Adair County, ~24% vote Democratic, ~65% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How Adair County compares
Among counties within 50 miles, Adair County leans more Republican than 12 of 15 neighbors.
Adair County runs about 33 points more Republican than Iowa as a whole.
Why Adair County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Adair County. 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; Adair County, IA 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 Adair County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Adair County 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 66%, about 6 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 95% of adults in Adair County have completed high school, above 90% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Union County, IA R+33
- Guthrie County, IA R+41
- Madison County, IA R+41
- Cass County, IA R+41
- Adams County, IA R+46
- Audubon County, IA R+46
- Dallas County, IA R+7
- Clarke County, IA R+41
- Taylor County, IA R+50
- Montgomery County, IA R+41
Counties with Similar Populations
- Harney County, OR R+47
- Marion County, GA R+29
- Doniphan County, KS R+58
- Wheeler County, GA R+31
- Kingman County, KS R+58
- Conejos County, CO R+25
- East Carroll Parish, LA D+18
- Nicholas County, KY R+60
- Worth County, IA R+37
- Cleveland County, AR R+69
Sources and methodology
Precinct-level voting records used to fit the model come from Iowa 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.