83313 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 70% of adults in 83313 typically vote, above the U.S. average of about 62%. Among adults in 83313, ~39% vote Democratic, ~31% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 83313 compares
83313 sits in a sparsely populated area with few comparable zip codes nearby.
83313 runs about 49 points more Democratic than Idaho as a whole. Idaho leans Republican overall, while 83313 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 83313. The west side runs the most Democratic (D+27) and the southeast side runs the most Republican (R+38), a spread of about 65 points.
Why 83313 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 83313, not a ranked or complete list of what matters most.
83313 votes against the grain of Idaho. Idaho leans Republican overall, while 83313 runs about 49 points more Democratic.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 83313, ID sits in the top quarter nationally 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 83313 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 83313 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 69%, about 9 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.