Chickasaw County leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 93% of adults in Chickasaw County typically vote, above the U.S. average of about 62%. Among adults in Chickasaw County, ~28% vote Democratic, ~65% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How Chickasaw County compares
Among counties within 50 miles, Chickasaw County leans more Republican than 11 of 14 neighbors.
Chickasaw County runs about 27 points more Republican than Iowa as a whole.
Why Chickasaw County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Chickasaw County. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Chickasaw County, IA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Chickasaw County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Chickasaw 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 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 81% of households in Chickasaw County own their home, above 84% of counties. High high-school completion lines up with higher turnout, and about 94% of adults in Chickasaw County have completed high school, above 82% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Bremer County, IA R+25
- Floyd County, IA R+30
- Howard County, IA R+35
- Fayette County, IA R+30
- Mitchell County, IA R+36
- Butler County, IA R+43
- Winneshiek County, IA R+13
- Black Hawk County, IA D+3
- Buchanan County, IA R+36
- Cerro Gordo County, IA R+18
Counties with Similar Populations
- Lawrence County, MS R+30
- Prowers County, CO R+38
- Little River County, AR R+45
- Washington County, KY R+58
- Skamania County, WA R+13
- Greene County, IL R+56
- Morris County, TX R+39
- Boundary County, ID R+64
- Koochiching County, MN R+26
- Summers County, WV R+52
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.