83656 is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 51% of adults in 83656 typically vote, below the U.S. average of about 62%. Among adults in 83656, ~8% vote Democratic, ~43% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 83656 compares
Among zip codes within 15 miles, 83656 leans more Republican than 11 of 12 neighbors.
83656 runs about 31 points more Republican than Idaho as a whole.
Why 83656 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 83656, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 12% of adults in 83656 hold a bachelor's degree, about 15 points below the Idaho average of 26%. A high family-household share predicts Republican voting, and about 77% of households in 83656 are family households, above 85% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 83656, ID sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 83656 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 83656 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Crowded housing lines up with lower turnout, and about 8% of homes in 83656 have more than one occupant per room, above 94% of zip codes. Low high-school completion lines up with lower turnout, and about 79% of adults in 83656 have completed high school, below 92% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Idaho 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.