83455 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 88% of adults in 83455 typically vote, above the U.S. average of about 62%. Among adults in 83455, ~37% vote Democratic, ~51% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 83455 compares
Among zip codes within 15 miles, 83455 leans more Republican than 2 of 4 neighbors.
83455 runs about 20 points more Democratic than Idaho as a whole.
Politics vary noticeably by block within 83455. The southwest side is the most Republican-leaning (R+25) and the northeast side is the least Republican-leaning (R+11), a spread of about 14 points.
Why 83455 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 83455. The lean here lands roughly where demographic data alone would predict.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; 83455, ID sits in the bottom quarter nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in 83455 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 83455 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 73%, about 13 points above the U.S. average of 60%. 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.