Iatan, MO Political Map | Democrat & Republican Areas in Iatan

Iatan leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.

 
Iatan, MO block-group political-lean map
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About 86% of adults in Iatan typically vote, above the U.S. average of about 62%. Among adults in Iatan, ~26% vote Democratic, ~60% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.

Iatan, MO block-group voter-turnout map
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How Iatan compares

Among cities within 25 miles, Iatan leans more Republican than 17 of 62 neighbors.

Iatan runs about 22 points more Republican than Missouri as a whole.

Why Iatan 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 Iatan, not a ranked or complete list of what matters most.

Car-dependent areas vote Republican. About 90% of residents in Iatan drive to work alone, about 16 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 78% of households in Iatan are family households, above 84% of cities.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Iatan, MO sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Iatan looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Iatan 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 67%, about 7 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Iatan own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 97% of adults in Iatan have completed high school, above 90% of cities. Learn more about the findings and methodology on the political spectrum map.

Cities with Similar Populations

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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.