59066 leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 60% of adults in 59066 typically vote, near the U.S. average of about 62%. Among adults in 59066, ~27% vote Democratic, ~32% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 59066 compares
59066 runs about 13 points more Democratic than Montana as a whole.
Why 59066 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 59066, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 86% of households in 59066 are family households, about 19 points above the U.S. average of 67%. Low college attainment predicts Republican voting, and 59066 sits in the bottom quarter (about 17%, below 75% of zip codes).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 59066, MT sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 59066 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 59066 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 25% of adults in 59066 report food insecurity, above 89% of zip codes. High-crime urban areas turn out at lower rates, and 59066 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.