Fair Lawn
- County:
- Bergen County
- County Seat:
- No
- Area (mi²):
- 5.135
- State:
- New Jersey
Fair Lawn is a borough located in Bergen County, New Jersey. Fair Lawn has a 2026 population of 36,489. Fair Lawn is currently growing at a rate of 1.67% annually and its population has increased by 4.65% since the most recent census, which recorded a population of 34,867 in 2020.