Kirby leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 39% of adults in Kirby typically vote, below the U.S. average of about 62%. Among adults in Kirby, ~21% vote Democratic, ~18% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How Kirby compares
Among cities within 25 miles, Kirby leans more Democratic than 3 of 6 neighbors.
Kirby runs about 27 points more Democratic than Montana as a whole. Montana leans Republican overall, while Kirby is one of the few Democratic-leaning pockets.
Why Kirby 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 Kirby, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 42% of adults in Kirby have never been married, well above similar-sized cities (around 22%). Kirby runs against the grain of Montana, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Kirby, MT sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Kirby looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Kirby 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 46%, about 16 points below the Montana average of 62%. Renters vote less often than owners, and about 34% of households in Kirby rent, above 89% of cities. High food insecurity lines up with lower turnout, and about 32% of adults in Kirby report food insecurity, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Busby, MT D+9
- Lodge Grass, MT D+26
- Garryowen, MT D+37
- Decker, MT Even
- Birney, MT R+8
- Wyola, MT D+5
- Lame Deer, MT D+40
- Crow Agency, MT D+28
- Parkman, WY R+62
- Ranchester, WY R+67
Cities with Similar Populations
- Agnes, MO R+71
- Capehart, WV R+70
- Aonia, GA R+57
- Lingo, MO R+68
- San Mateo, NM R+8
- Millhome, WI R+35
- Bivens, LA R+77
- Osborn, AL R+28
- Bishop, TN R+71
- Miola, PA R+53
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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.