Stillwater County is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 85% of adults in Stillwater County typically vote, above the U.S. average of about 62%. Among adults in Stillwater County, ~18% vote Democratic, ~67% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Stillwater County compares
Among counties within 50 miles, Stillwater County leans more Republican than 3 of 4 neighbors.
Stillwater County runs about 37 points more Republican than Montana as a whole.
Politics vary noticeably by city within Stillwater County. The northwest side is the most Republican-leaning (R+75) and the southwest side is the least Republican-leaning (R+42), a spread of about 33 points.
Why Stillwater County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Stillwater County. The lean here lands roughly where demographic data alone would predict.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; Stillwater County, MT sits in the bottom tenth nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in Stillwater County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Stillwater County is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 66%, about 6 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 83% of households in Stillwater County own their home, above 92% of counties. High high-school completion lines up with higher turnout, and about 95% of adults in Stillwater County have completed high school, above 94% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Carbon County, MT R+38
- Yellowstone County, MT R+25
- Sweet Grass County, MT R+54
- Golden Valley County, MT R+69
- Wheatland County, MT R+66
- Park County, MT R+14
- Musselshell County, MT R+64
- Park County, WY R+51
- Big Horn County, WY R+73
- Big Horn County, MT Even
Counties with Similar Populations
- Phelps County, NE R+58
- Dawson County, MT R+55
- Kemper County, MS D+23
- Crittenden County, KY R+68
- Mitchell County, TX R+50
- Palo Alto County, IA R+44
- Richmond County, VA R+33
- Turner County, GA R+19
- Cuming County, NE R+63
- Catahoula Parish, LA R+50
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.