83204 leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 70% of adults in 83204 typically vote, above the U.S. average of about 62%. Among adults in 83204, ~28% vote Democratic, ~42% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 83204 compares
Among zip codes within 15 miles, 83204 leans more Republican than 3 of 5 neighbors.
83204 runs about 16 points more Democratic than Idaho as a whole.
Politics vary noticeably by block within 83204. The west side is the most Republican-leaning (R+61) and the north side is the least Republican-leaning (R+8), a spread of about 53 points.
Why 83204 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 83204. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 83204, ID sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 83204 looks the way it does
Turnout in 83204 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.