59812 is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.
About 57% of adults in 59812 typically vote, near the U.S. average of about 62%. Among adults in 59812, ~45% vote Democratic, ~12% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How 59812 compares
Among zip codes within 15 miles, 59812 is the most Democratic-leaning.
59812 runs about 78 points more Democratic than Montana as a whole. Montana leans Republican overall, while 59812 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 59812. The west side is the most Democratic-leaning (D+58) and the northeast side is the least Democratic-leaning (D+21), a spread of about 37 points.
Why 59812 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 59812, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in 59812 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 59812 sits in the top quarter (about 56%, above 92% of zip codes). 59812 runs against the grain of Montana, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 59812, MT sits in the top tenth 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 59812 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 59812 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 67% of households in 59812 rent, compared to around 27% in nearby zip codes. Low high-school completion lines up with lower turnout, and more than 99% of adults in 59812 have completed high school, in the top fraction 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.