Portage Des Sioux is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 66% of adults in Portage Des Sioux typically vote, near the U.S. average of about 62%. Among adults in Portage Des Sioux, ~15% vote Democratic, ~51% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Portage Des Sioux compares
Among cities within 25 miles, Portage Des Sioux leans more Republican than 134 of 147 neighbors.
Portage Des Sioux runs about 37 points more Republican than Missouri as a whole.
Why Portage Des Sioux 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 Portage Des Sioux, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 90% of residents in Portage Des Sioux drive to work alone, about 16 points above the U.S. average of 74%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Portage Des Sioux, MO sits below 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 Portage Des Sioux looks the way it does
Turnout in Portage Des Sioux 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
- Elsah, IL R+32
- Dow, IL R+36
- Grafton, IL R+39
- Orchard Farm, MO R+57
- Old Jamestown, MO D+64
- West Alton, MO R+52
- South Shore, MO R+54
- Otterville, IL R+51
- Godfrey, IL R+18
- Florissant, MO D+51
Cities with Similar Populations
- Lizemores, WV R+66
- Gary, SD R+53
- New Vernon, NJ R+8
- Pilgrim, KY R+79
- New Weston, OH R+78
- Megargel, AL R+68
- Denmark, MS R+56
- Diagonal, IA R+55
- Leeton, UT R+36
- Sheppards, GA R+54
Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.