59230 leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 88% of adults in 59230 typically vote, above the U.S. average of about 62%. Among adults in 59230, ~24% vote Democratic, ~64% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 59230 compares
59230 sits in a sparsely populated area with few comparable zip codes nearby.
59230 runs about 26 points more Republican than Montana as a whole.
Politics vary noticeably by block within 59230. The east side is the most Republican-leaning (R+58) and the south side is the least Republican-leaning (R+41), a spread of about 17 points.
Why 59230 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 59230. The lean here lands roughly where demographic data alone would predict.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 59230, MT sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 59230 looks the way it does
Turnout in 59230 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 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.