
Westby
- County:
- Sheridan County
- County Seat:
- No
- Area (mi²):
- 0.562
- State:
- Montana
Westby is a town located in Sheridan County, Montana. Westby has a 2025 population of 163. Westby is currently declining at a rate of -0.61% annually and its population has decreased by -2.4% since the most recent census, which recorded a population of 167 in 2020.
The average household income in Westby is $50,364 with a poverty rate of 10.28%. The median age in Westby is 53.7 years: 60 years for males, and 53 years for females.