83660 is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 69% of adults in 83660 typically vote, above the U.S. average of about 62%. Among adults in 83660, ~13% vote Democratic, ~56% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 83660 compares
Among zip codes within 15 miles, 83660 leans more Republican than 4 of 8 neighbors.
83660 runs about 27 points more Republican than Idaho as a whole.
Why 83660 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 83660, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 74% of households in 83660 are family households, about 7 points above the U.S. average of 67%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 83660, ID sits below the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 83660 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 83660 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.