Idaho is a Republican stronghold. About 12% of voters here vote Democratic and 88% Republican.
About 74% of adults in Idaho typically vote, above the U.S. average of about 62%. Among adults in Idaho, ~9% vote Democratic, ~65% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Idaho compares
Among cities within 25 miles, Idaho leans more Republican than 68 of 77 neighbors.
Idaho runs about 47 points more Republican than Tennessee as a whole.
Why Idaho 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 Idaho, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 93% of residents in Idaho drive to work alone, about 19 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and Idaho sits in the bottom quarter (about 5%, in the bottom fraction of cities). A high family-household share predicts Republican voting, and about 77% of households in Idaho are family households, above 82% of cities.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Idaho, TN sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Idaho looks the way it does
Limited routine healthcare access lines up with lower turnout, and Idaho sits in the bottom quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Revilo, TN R+74
- Five Points, TN R+77
- Ramah, TN R+77
- Fallriver, TN R+72
- Leoma, TN R+73
- Minor Hill, TN R+73
- Goodspring, TN R+71
- Busby, TN R+68
- Loretto, TN R+67
Cities with Similar Populations
- Egypt Mills, PA R+21
- Baker, ND R+46
- Halfway, WY R+75
- Trading Post, KS R+62
- Tacoma Park, SD R+58
- Meridian, AR R+86
Sources and methodology
Precinct-level voting records used to fit the model come from Tennessee Secretary of State, Division of 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.