
Fallon
- County:
- Prairie County
- County Seat:
- No
- Area (mi²):
- 5.08
- State:
- Montana
Fallon is a CDP located in Prairie County, Montana. Fallon has a 2025 population of 409. Fallon is currently growing at a rate of 4.07% annually and its population has increased by 90.23% since the most recent census, which recorded a population of 215 in 2020.
The average household income in Fallon is $37,544 with a poverty rate of 47.54%. The median age in Fallon is 37.3 years: 37.5 years for males, and 37.1 years for females.