83641 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 59% of adults in 83641 typically vote, near the U.S. average of about 62%. Among adults in 83641, ~8% vote Democratic, ~51% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 83641 compares
Among zip codes within 15 miles, 83641 is the most Republican-leaning.
83641 runs about 36 points more Republican than Idaho as a whole.
Why 83641 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 83641, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 78% of households in 83641 are family households, about 11 points above the U.S. average of 67%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 83641, ID sits in the bottom quarter 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 83641 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 83641 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 7% of homes in 83641 have more than one occupant per room, above 91% 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.