Irwin is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.
About 63% of adults in Irwin typically vote, near the U.S. average of about 62%. Among adults in Irwin, ~8% vote Democratic, ~55% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How Irwin compares
Among cities within 25 miles, Irwin leans more Republican than 46 of 49 neighbors.
Irwin runs about 55 points more Republican than Missouri as a whole.
Why Irwin 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 Irwin, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 16% of adults in Irwin hold a bachelor's degree, about 6 points below the Missouri average of 22%.
Population density and Republican lean
Places with low population density tend to lean Republican; Irwin, MO sits in the bottom quarter nationally on this measure.
Why turnout in Irwin looks the way it does
Turnout in Irwin 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
- Milford, MO R+73
- Sheldon, MO R+72
- Lamar, MO R+60
- Lamar Heights, MO R+62
- Verdella, MO R+73
- Iantha, MO R+72
- Newport, MO R+74
- Kenoma, MO R+73
- Montevallo, MO R+73
- Milo, MO R+69
Cities with Similar Populations
- Plaisance, LA R+38
- Turkey, TX R+79
- Reba, VA R+50
- Starbrick, PA R+43
- Owings, SC R+61
- Lawrenceburg, MO R+70
- Rosser, TX R+70
- Supreme, LA D+5
- Kurten, TX R+54
- Lyons, KY R+63
All Local Stats
Home Services
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.