83849 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 85% of adults in 83849 typically vote, above the U.S. average of about 62%. Among adults in 83849, ~26% vote Democratic, ~59% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How 83849 compares
Among zip codes within 15 miles, 83849 leans more Republican than 1 of 8 neighbors.
Politically, 83849 sits close to the rest of Idaho.
Politics vary noticeably by block within 83849. The northeast side is the most Republican-leaning (R+47) and the west side is the least Republican-leaning (R+35), a spread of about 11 points.
Why 83849 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 83849, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 17% of adults in 83849 hold a bachelor's degree, about 10 points below the Idaho average of 26%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 83849, ID sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 83849 looks the way it does
Turnout in 83849 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.