Osterdock is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 72% of adults in Osterdock typically vote, above the U.S. average of about 62%. Among adults in Osterdock, ~18% vote Democratic, ~54% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Osterdock compares
Among cities within 25 miles, Osterdock leans more Republican than 58 of 62 neighbors.
Osterdock runs about 37 points more Republican than Iowa as a whole.
Why Osterdock leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Osterdock, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Osterdock, about 98% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 7% of adults hold a bachelor's degree, about 17 points below the Iowa average of 24%.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; Osterdock, IA sits below the national average on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Osterdock looks the way it does
Turnout in Osterdock sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Millville, IA R+49
- Garber, IA R+48
- Colesburg, IA R+51
- Guttenberg, IA R+35
- Turkey River, IA R+37
- Wood, IA R+51
- Elkport, IA R+49
- Luxemburg, IA R+46
- Cassville, WI R+38
- North Buena Vista, IA R+48
Cities with Similar Populations
- Hatcher, KY R+59
- Silver Creek, WI R+44
- Oranda, VA R+47
- East Deering, NH R+12
- Coalville, NC R+61
- Hazel Patch, KY R+71
- Otto, IL R+40
- Olds, IA R+46
- Nordness, IA R+37
- Oldham, SD R+47
All Local Stats
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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.