Rocky Boy leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 57% of adults in Rocky Boy typically vote, near the U.S. average of about 62%. Among adults in Rocky Boy, ~35% vote Democratic, ~22% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.
How Rocky Boy compares
Among cities within 25 miles, Rocky Boy leans more Democratic than 5 of 10 neighbors.
Rocky Boy runs about 43 points more Democratic than Montana as a whole. Montana leans Republican overall, while Rocky Boy is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Rocky Boy. The northwest side runs the most Democratic (D+72) and the southeast side runs the most Republican (R+61), a spread of about 133 points.
Why Rocky Boy 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 Rocky Boy, not a ranked or complete list of what matters most.
Rocky Boy votes against the grain of Montana. Montana leans Republican overall, while Rocky Boy runs about 43 points more Democratic. A high never-married share predicts Democratic voting, and about 46% of adults in Rocky Boy have never been married, above 97% of cities.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; Rocky Boy, 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 Rocky Boy looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Rocky Boy is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 48% of households in Rocky Boy rent, about 23 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 27% of adults in Rocky Boy report food insecurity, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Azure, MT D+72
- Sangrey, MT D+72
- St. Pierre, MT D+72
- Parker School, MT D+72
- Box Elder, MT D+61
- Warrick, MT R+37
- Havre, MT R+38
- Kremlin, MT R+29
- Big Sandy, MT R+23
- Kenilworth, MT R+53
Cities with Similar Populations
- Lund, NV R+66
- Quinn, AR R+57
- Rapidan, MN R+26
- Laurel Mills, VA R+8
- Boughton, AR R+36
- Winston, VA R+34
- Kanawha Drive, WV R+63
- Walcksville, PA R+38
- Fires Creek, NC R+43
- Blackwood, AL R+70
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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.