Fairfield
- County:
- Teton County
- County Seat:
- No
- Area (mi²):
- 0.319
- State:
- Montana
Fairfield is a town located in Teton County, Montana. Fairfield has a 2026 population of 794. Fairfield is currently declining at a rate of 0% annually and its population has increased by 2.98% since the most recent census, which recorded a population of 771 in 2020.
The median household income in Fairfield is $69,265 with a poverty rate of 5.21%. The median age in Fairfield is 31.8 years: 31.8 years for males, and 31.8 years for females. For every 100 females there are 92.6 males.