83677 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 53% of adults in 83677 typically vote, below the U.S. average of about 62%. Among adults in 83677, ~16% vote Democratic, ~37% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 83677 compares
Politically, 83677 sits close to the rest of Idaho.
Politics vary noticeably by block within 83677. The southwest side is the most Republican-leaning (R+42) and the northwest side is the least Republican-leaning (R+14), a spread of about 29 points.
Why 83677 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 83677, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 83677 sits in the bottom quarter on density and more than 99% of residents are non-Hispanic white, about 17 points above the Idaho average of 83%. A high family-household share predicts Republican voting, and more than 99% of households in 83677 are family households, in the top fraction of zip codes.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 83677, ID sits in the bottom tenth 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 83677 looks the way it does
Renters vote less often than owners. More than 99% of households in 83677 rent, about 75 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
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.