Dickinson County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 99% of adults in Dickinson County typically vote, above the U.S. average of about 62%. Among adults in Dickinson County, ~33% vote Democratic, ~66% Republican, and ~1% don't vote. The map below shows estimated turnout by block group.
How Dickinson County compares
Among counties within 50 miles, Dickinson County leans more Republican than 3 of 14 neighbors.
Dickinson County runs about 21 points more Republican than Iowa as a whole.
Politics vary noticeably by city within Dickinson County. The southeast side is the most Republican-leaning (R+48) and the west side is the least Republican-leaning (R+28), a spread of about 20 points.
Why Dickinson County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Dickinson County. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Dickinson County, IA does.
Why turnout in Dickinson County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dickinson 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Dickinson County have completed high school, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Clay County, IA R+34
- Emmet County, IA R+37
- Jackson County, MN R+42
- Osceola County, IA R+57
- Palo Alto County, IA R+44
- Nobles County, MN R+28
- O'Brien County, IA R+54
- Martin County, MN R+38
- Cottonwood County, MN R+46
- Kossuth County, IA R+45
Counties with Similar Populations
- Winston County, MS R+10
- Eastland County, TX R+67
- Burleson County, TX R+53
- Hughes County, SD R+34
- Hancock County, IL R+45
- San Juan County, WA D+50
- Seward County, NE R+52
- Patrick County, VA R+58
- Avery County, NC R+52
- King William County, VA R+38
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.