Ballantine is a CDP located in Yellowstone County, Montana. Ballantine has a 2026 population of 287. Ballantine is currently declining at a rate of -0.69% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The median age in Ballantine is 63.3 years: 62.4 years for males, and 89.1 years for females. For every 100 females there are 60.7 males.
Data after 2023 is projected based on recent change
Overall: 63.3 years
Female: 89.1 years
Male: 62.4 years
There are 227 adults, (101 of whom are seniors) in Ballantine.
Female: 163 (62.2%)
Male: 99 (37.8%)
The racial composition of Ballantine includes 91.98% White, 4.2% Native American, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 241 | 91.98% |
| Native American | 11 | 4.2% |
| Two or more races | 10 | 3.82% |