59031 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 46% of adults in 59031 typically vote, below the U.S. average of about 62%. Among adults in 59031, ~31% vote Democratic, ~15% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 59031 compares
59031 sits in a sparsely populated area with few comparable zip codes nearby.
59031 runs about 57 points more Democratic than Montana as a whole. Montana leans Republican overall, while 59031 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 59031. The north side is the most Democratic-leaning (D+42) and the southeast side is the least Democratic-leaning (D+5), a spread of about 37 points.
Why 59031 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 59031, not a ranked or complete list of what matters most.
59031 votes against the grain of Montana. Montana leans Republican overall, while 59031 runs about 57 points more Democratic. A high never-married share predicts Democratic voting, and about 46% of adults in 59031 have never been married, above 92% of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 59031, MT sits in the bottom tenth 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 59031 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 59031 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 39%, about 23 points below the Montana average of 62%. High food insecurity lines up with lower turnout, and about 43% of adults in 59031 report food insecurity, in the top fraction of zip codes. High-crime urban areas turn out at lower rates, and 59031 sits in the top 15% on a violent-crime measure. 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.