Springbrook leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 78% of adults in Springbrook typically vote, above the U.S. average of about 62%. Among adults in Springbrook, ~22% vote Democratic, ~56% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Springbrook compares
Among cities within 25 miles, Springbrook leans more Republican than 33 of 54 neighbors.
Springbrook runs about 30 points more Republican than Iowa as a whole.
Why Springbrook 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 Springbrook, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Springbrook, about 97% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 10 points below the Iowa average of 24%. Rural areas vote Republican, and Springbrook sits in the bottom quarter on density (about 5%, below 78% of cities).
Population density and Republican lean
Places with low population density tend to lean Republican; Springbrook, IA sits in the bottom quarter nationally on this measure.
Why turnout in Springbrook looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Springbrook 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 73%, about 13 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Spragueville, IA R+50
- Andrew, IA R+42
- Bellevue, IA R+37
- Preston, IA R+42
- Miles, IA R+48
- Hurstville, IA R+42
- Maquoketa, IA R+25
- St. Donatus, IA R+40
- La Motte, IA R+44
- Hanover, IL R+29
Cities with Similar Populations
- Mc Intyre, PA R+55
- Rocky Hill, AL R+44
- Tallulah Falls, GA R+63
- Murray Store, TN R+74
- Omega, OK R+75
- Vandyke, VA R+69
- Elgin, TN R+71
- Hamburg, LA R+64
- Hand Valley, AR R+63
- Carthage, AR R+3
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.