what county is waldwick in
Waldwick is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 9,625, reflecting an increase of 3 (+0.0%) from the 9,622 counted in the 2000 Census, which had in turn declined by 135 (-1.4%) from the 9,757 counted in the 1990 Census.