59318 is a Republican stronghold. About 6% of voters here vote Democratic and 94% Republican.
About 90% of adults in 59318 typically vote, above the U.S. average of about 62%. Among adults in 59318, ~6% vote Democratic, ~84% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How 59318 compares
59318 runs about 67 points more Republican than Montana as a whole.
Why 59318 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 59318, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 59318 sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 14 points above the Montana average of 83%.
Population density and Republican lean
Places with low population density tend to lean Republican; 59318, MT sits in the bottom tenth nationally on this measure.
Why turnout in 59318 looks the way it does
High high-school completion lines up with higher turnout, and about 96% of adults in 59318 have completed high school, above 84% of zip codes. 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 Montana 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.