
Fairfield
- County:
- Jefferson County
- County Seat:
- No
- Area (mi²):
- 3.464
- State:
- Alabama
Fairfield is a city located in Jefferson County, Alabama. Fairfield has a 2025 population of 9,313. Fairfield is currently declining at a rate of -1.42% annually and its population has decreased by -6.73% since the most recent census, which recorded a population of 9,985 in 2020.
The average household income in Fairfield is $58,970 with a poverty rate of 30.32%. The median age in Fairfield is 30.3 years: 29 years for males, and 30.7 years for females.