
Fairbury
- County:
- Livingston County
- County Seat:
- No
- Area (mi²):
- 1.828
- State:
- Illinois
Fairbury is a city located in Livingston County, Illinois. Fairbury has a 2025 population of 3,535. Fairbury is currently declining at a rate of -0.53% annually and its population has decreased by -2.67% since the most recent census, which recorded a population of 3,632 in 2020.
The average household income in Fairbury is $83,719 with a poverty rate of 3.57%. The median age in Fairbury is 39.5 years: 41.2 years for males, and 39.1 years for females.