Glacier County leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 66% of adults in Glacier County typically vote, near the U.S. average of about 62%. Among adults in Glacier County, ~43% vote Democratic, ~22% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Glacier County compares
Glacier County sits in a sparsely populated area with few comparable counties nearby.
Glacier County runs about 52 points more Democratic than Montana as a whole. Montana leans Republican overall, while Glacier County is one of the few Democratic-leaning pockets.
Politics vary noticeably by city within Glacier County. The south side runs the most Democratic (D+68) and the northeast side runs the most Republican (R+35), a spread of about 103 points.
Why Glacier 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 Glacier County, not a ranked or complete list of what matters most.
Glacier County votes against the grain of Montana. Montana leans Republican overall, while Glacier County runs about 52 points more Democratic. A high never-married share predicts Democratic voting, and about 46% of adults in Glacier County have never been married, above 97% of counties.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; Glacier County, MT sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Glacier County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Glacier County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 45%, about 17 points below the Montana average of 62%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Pondera County, MT R+35
- Toole County, MT R+43
- Teton County, MT R+60
- Flathead County, MT R+32
- Liberty County, MT R+56
- Lake County, MT R+21
- Cascade County, MT R+25
- Chouteau County, MT R+24
- Lincoln County, MT R+50
- Sanders County, MT R+54
Counties with Similar Populations
- Washington County, IL R+53
- Winn Parish, LA R+44
- Morgan County, OH R+55
- Converse County, WY R+66
- Newton County, IN R+54
- Morgan County, KY R+64
- Madison County, VA R+34
- Breathitt County, KY R+62
- Chowan County, NC R+12
- Callahan County, TX 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.