Portland Mills is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 59% of adults in Portland Mills typically vote, near the U.S. average of about 62%. Among adults in Portland Mills, ~12% vote Democratic, ~47% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How Portland Mills compares
Among cities within 25 miles, Portland Mills leans more Republican than 61 of 96 neighbors.
Portland Mills runs about 41 points more Republican than Indiana as a whole.
Why Portland 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 Portland Mills, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Portland Mills, about 94% of residents are non-Hispanic white, about 22 points above the U.S. average of 72%; about 15% of adults hold a bachelor's degree, about 8 points below the Indiana average of 22%.
Housing overcrowding and voter turnout
Places with heavy housing overcrowding tend to turn out at a lower rate; Portland Mills, IN sits in the top tenth nationally on this measure.
Why turnout in Portland Mills looks the way it does
Crowded housing lines up with lower turnout. About 7% of homes in Portland Mills have more than one occupant per room, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hollandsburg, IN R+59
- Milligan, IN R+65
- Morton, IN R+64
- Russellville, IN R+63
- Clinton Falls, IN R+62
- Guion, IN R+65
- Fincastle, IN R+63
- Nyesville, IN R+63
- Waveland, IN R+61
- Mansfield, IN R+58
Cities with Similar Populations
- Howells Crossroads, AL R+53
- Strong, PA R+41
- Guion, AR R+64
- Felty, KY R+76
- East Alstead, NH R+16
- Lenox Center, OH R+52
- Bodcaw, AR R+62
- Oklahoma Flat, TX R+76
- Hazen, PA R+69
- Waller, PA R+57
Sources and methodology
Precinct-level voting records used to fit the model come from Indiana 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.