Grass Range, MT Political Map | Democrat & Republican Areas in Grass Range

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

Grass Range is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.

 

About 69% of adults in Grass Range typically vote, above the U.S. average of about 62%. Among adults in Grass Range, ~9% vote Democratic, ~60% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.

How Grass Range compares

Among cities within 25 miles, Grass Range leans more Republican than 3 of 4 neighbors.

Grass Range runs about 54 points more Republican than Montana as a whole.

Why Grass Range leans the way it does

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

Rural areas with a high white share vote Republican. Grass Range sits in the bottom quarter on density and about 95% of residents are non-Hispanic white, about 12 points above the Montana average of 83%.

High-school completion, developed land, and voter turnout

Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as Grass Range, MT does.

Why turnout in Grass Range looks the way it does

Areas with high high-school completion turn out at higher rates. About 97% of adults in Grass Range have completed high school, about 8 points above the U.S. average of 90%. 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.