59223 is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 75% of adults in 59223 typically vote, above the U.S. average of about 62%. Among adults in 59223, ~13% vote Democratic, ~61% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 59223 compares
59223 runs about 43 points more Republican than Montana as a whole.
Politics vary noticeably by block within 59223. The southeast side is the most Republican-leaning (R+77) and the north side is the least Republican-leaning (R+61), a spread of about 16 points.
Why 59223 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 59223, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 59223 sits in the bottom quarter on density and about 94% of residents are non-Hispanic white, about 11 points above the Montana average of 83%. A high family-household share predicts Republican voting, and about 78% of households in 59223 are family households, above 87% of zip codes.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 59223, 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 59223 looks the way it does
Homeowners vote more often than renters. About 95% of households in 59223 own their home, about 19 points above the Montana average of 77%. High high-school completion lines up with higher turnout, and more than 99% of adults in 59223 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.