Crawford County leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 74% of adults in Crawford County typically vote, above the U.S. average of about 62%. Among adults in Crawford County, ~23% vote Democratic, ~51% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Crawford County compares
Among counties within 50 miles, Crawford County leans more Republican than 1 of 10 neighbors.
Crawford County runs about 24 points more Republican than Iowa as a whole.
Politics vary noticeably by city within Crawford County. The southeast side is the most Republican-leaning (R+59) and the south side is the least Republican-leaning (R+37), a spread of about 22 points.
Why Crawford County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Crawford County. The lean here lands roughly where demographic data alone would predict.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Crawford County, IA sits above the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Crawford County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Crawford County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Carroll County, IA R+44
- Shelby County, IA R+48
- Ida County, IA R+57
- Sac County, IA R+51
- Monona County, IA R+46
- Audubon County, IA R+46
- Harrison County, IA R+42
- Calhoun County, IA R+48
- Buena Vista County, IA R+21
- Cass County, IA R+41
Counties with Similar Populations
- Burnett County, WI R+32
- Richland County, ND R+38
- Madison County, AR R+61
- Lee County, SC D+20
- Idaho County, ID R+64
- Madison County, IA R+41
- La Paz County, AZ R+28
- Phillips County, AR D+20
- Fountain County, IN R+58
- Socorro County, NM Even
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.