New Milford is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 16,341, reflecting a decline of 59 from the 16,400 counted in the 2000 Census, which had in turn increased by 410 from the 15,990 counted in the 1990 Census.New Milford was incorporated as a borough on March 11, 1922, from what remained of Palisades Township, based on the results of a referendum held on April 18, 1922. With the creation of New Milford, Palisades Township was dissolved. The borough is believed to have been named for Milford, Pennsylvania.