83424 leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 88% of adults in 83424 typically vote, above the U.S. average of about 62%. Among adults in 83424, ~25% vote Democratic, ~63% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 83424 compares
Among zip codes within 15 miles, 83424 is the most Republican-leaning.
83424 runs about 7 points more Republican than Idaho as a whole.
Why 83424 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 83424, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 4% of residents in 83424 live in densely developed areas, about 14 points below the Idaho average of 18%. A high family-household share predicts Republican voting, and about 75% of households in 83424 are family households, above 78% of zip codes.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 83424, ID sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 83424 looks the way it does
Homeowners vote more often than renters. About 97% of households in 83424 own their home, about 17 points above the Idaho average of 79%. High high-school completion lines up with higher turnout, and about 98% of adults in 83424 have completed high school, above 96% 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.