Poweshiek County leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 89% of adults in Poweshiek County typically vote, above the U.S. average of about 62%. Among adults in Poweshiek County, ~36% vote Democratic, ~54% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Poweshiek County compares
Among counties within 50 miles, Poweshiek County leans more Republican than 1 of 11 neighbors.
Poweshiek County runs about 6 points more Republican than Iowa as a whole.
Politics vary noticeably by city within Poweshiek County. The northwest side runs the most Democratic (D+8) and the southeast side runs the most Republican (R+50), a spread of about 58 points.
Why Poweshiek County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Poweshiek 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; Poweshiek County, IA sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Poweshiek County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Poweshiek 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%. High high-school completion lines up with higher turnout, and about 95% of adults in Poweshiek County have completed high school, above 93% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Jasper County, IA R+28
- Tama County, IA R+25
- Marshall County, IA R+17
- Mahaska County, IA R+38
- Iowa County, IA R+38
- Marion County, IA R+34
- Keokuk County, IA R+47
- Benton County, IA R+36
- Grundy County, IA R+42
- Monroe County, IA R+43
Counties with Similar Populations
- Bethel Census Area, AK D+18
- Crawford County, IL R+50
- Warren County, NC D+19
- Concordia Parish, LA R+24
- Clay County, MS D+18
- Otero County, CO R+23
- Harrison County, KY R+51
- Andrews County, TX R+62
- Deaf Smith County, TX R+30
- Randolph County, AR R+63
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.