Troy Mills, IA Political Map | Democrat & Republican Areas in Troy Mills

By the BestNeighborhood data science team. Last updated May 2026.

Troy Mills leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.

 

About 82% of adults in Troy Mills typically vote, above the U.S. average of about 62%. Among adults in Troy Mills, ~36% vote Democratic, ~46% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.

How Troy Mills compares

Among cities within 25 miles, Troy Mills leans more Republican than 13 of 52 neighbors.

Politically, Troy Mills sits close to the rest of Iowa.

Politics vary noticeably by neighborhood within Troy Mills. The north side is the most Republican-leaning (R+33) and the south side is the least Republican-leaning (R+4), a spread of about 29 points.

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

Troy Mills votes Republican even though it is densely developed (about 32%, well above the Iowa average of 16%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 80% of households in Troy Mills are family households, above 89% of cities.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Troy Mills, IA 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 Troy Mills looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Troy Mills 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 74%, about 14 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Troy Mills own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in Troy Mills have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.

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.