Fair Lawn is a borough in Bergen County, New Jersey, United States and a suburban municipality in the New York City Metropolitan Area. As of the 2010 United States Census, the borough's population was 32,457, reflecting an increase of 820 (+2.6%) from the 31,637 counted in the 2000 Census, which had in turn increased by 1,089 (+3.6%) from the 30,548 counted in the 1990 Census.
Fair Lawn was incorporated as a borough by an Act of the New Jersey Legislature on March 6, 1924, as "Fairlawn", from portions of Saddle River Township. The name was taken from Fairlawn, David Acker's estate home, that was built in 1865 and later became the Fair Lawn Municipal Building. In 1933, the official spelling of the borough's name was split into its present two-word form as "Fair Lawn" Borough.
Radburn, one of the first planned communities in the United States, is an unincorporated community located within Fair Lawn, and was founded in 1929 as "a town for the motor age".