Montana Political Map | Democrat & Republican Areas in Montana

By the BestNeighborhood data science team. Last updated May 2026.

Montana leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.

 

About 80% of adults in Montana typically vote, above the U.S. average of about 62%. Among adults in Montana, ~32% vote Democratic, ~48% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.

How Montana compares

Among states within 500 miles, Montana leans more Republican than 2 of 4 neighbors.

Politics vary noticeably by county within Montana. The east side is the most split-leaning (R+55) and the south side is the least split-leaning (R+3), a spread of about 52 points.

Why Montana leans the way it does

This analysis examined 14,881 data points per state to find what predicts political lean and turnout. The items below are a few correlations that stood out for Montana, not a ranked or complete list of what matters most.

Rural areas with a high white share vote Republican. Montana sits in the bottom quarter on density and about 83% of residents are non-Hispanic white, about 11 points above the U.S. average of 72%.

Population density and Republican lean

Places with low population density tend to lean Republican; Montana sits in the bottom quarter nationally on this measure.

Why turnout in Montana looks the way it does

Areas with high high-school completion turn out at higher rates. About 95% of adults in Montana have completed high school, above 96% of states. Learn more about the findings and methodology on the political spectrum map.

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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.