83623 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 60% of adults in 83623 typically vote, near the U.S. average of about 62%. Among adults in 83623, ~13% vote Democratic, ~47% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 83623 compares
83623 sits in a sparsely populated area with few comparable zip codes nearby.
83623 runs about 22 points more Republican than Idaho as a whole.
Why 83623 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 83623, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 11% of adults in 83623 hold a bachelor's degree, about 15 points below the Idaho average of 26%.
Population density and Republican lean
Places with low population density tend to lean Republican; 83623, ID sits below the national average on this measure.
Why turnout in 83623 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 83623 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Low high-school completion lines up with lower turnout, and about 84% of adults in 83623 have completed high school, below 83% 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.