Custer is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 57% of adults in Custer typically vote, near the U.S. average of about 62%. Among adults in Custer, ~8% vote Democratic, ~49% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How Custer compares
Among cities within 25 miles, Custer is the most Republican-leaning.
Custer runs about 52 points more Republican than Montana as a whole.
Why Custer leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Custer. The lean here lands roughly where demographic data alone would predict.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; Custer, MT sits in the bottom tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Custer looks the way it does
High-crime urban areas turn out at lower rates, mostly because the housing stress common in those areas makes voting harder. Custer sits in the top 15% nationally on a violent-crime measure. See CrimeGrade for more details. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Big Horn, MT R+66
- Pompeys Pillar, MT R+68
- Myers, MT R+66
- Hysham, MT R+66
- Worden, MT R+65
- Ballantine, MT R+64
- Hardin, MT R+18
- Sumatra, MT R+66
- Sanders, MT R+71
- Musselshell, MT R+71
Cities with Similar Populations
- Upland, NE R+71
- Fair River, MS R+62
- Derrick City, PA R+47
- Blooming Rose, MO R+72
- Kirksville, IL R+47
- Wadesboro, LA R+65
- Radford, IL R+62
- Yates, TX R+76
- The Narrows, NY R+45
- Hopson, KY R+62
All Local Stats
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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.