Garfield County is a Republican stronghold. About 6% of voters here vote Democratic and 94% Republican.
About 90% of adults in Garfield County typically vote, above the U.S. average of about 62%. Among adults in Garfield County, ~6% vote Democratic, ~84% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Garfield County compares
Garfield County runs about 67 points more Republican than Montana as a whole.
Why Garfield County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Garfield County, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Garfield County sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 14 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 Garfield County, MT does.
Why turnout in Garfield County looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in Garfield County have completed high school, about 6 points above the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- McCone County, MT R+72
- Valley County, MT R+48
- Petroleum County, MT R+69
- Treasure County, MT R+66
- Custer County, MT R+43
- Phillips County, MT R+52
- Prairie County, MT R+68
- Musselshell County, MT R+64
- Rosebud County, MT R+20
- Roosevelt County, MT Even
Counties with Similar Populations
- Alpine County, CA D+36
- Sioux County, NE R+79
- Glasscock County, TX R+85
- Skagway Municipality, AK R+23
- Stonewall County, TX R+68
- Foard County, TX R+69
- Prairie County, MT R+68
- Hyde County, SD R+60
- Rock County, NE R+74
- Sheridan County, ND R+69
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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.