Grand River leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 75% of adults in Grand River typically vote, above the U.S. average of about 62%. Among adults in Grand River, ~20% vote Democratic, ~55% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Grand River compares
Among cities within 25 miles, Grand River leans more Republican than 4 of 33 neighbors.
Grand River runs about 32 points more Republican than Iowa as a whole.
Why Grand River 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 Grand River, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Grand River sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 6 points above the Iowa average of 91%.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as Grand River, IA does.
Why turnout in Grand River looks the way it does
Turnout in Grand River 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
- Beaconsfield, IA R+53
- Ellston, IA R+53
- Van Wert, IA R+58
- Decatur, IA R+47
- Decatur City, IA R+46
- Kellerton, IA R+53
- Murray, IA R+56
- Weldon, IA R+57
- Thayer, IA R+49
- Tingley, IA R+54
Cities with Similar Populations
- Scuffleton, NC R+30
- Lakeside, MO R+70
- Selfridge, ND D+32
- Davin, WV R+69
- Sextonville, WI R+22
- Morris, PA R+64
- Porter Hill, OK R+50
- Folsomville, IN R+55
- Whitaker, IL R+53
- Pee Dee, NC R+26
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.