Rochelle Park is a township in Bergen County, New Jersey, United States. As of the 2010 United States Census, the township's population was 5,530, reflecting an increase of 2 (+0.0%) from the 5,528 counted in the 2000 Census, which had in turn declined by 59 (-1.1%) from the 5,587 counted in the 1990 Census.
What is now Rochelle Park was originally incorporated as Midland Township on March 7, 1871, from portions of New Barbadoes Township. Portions of the township were taken to form the boroughs of Delford (on March 8, 1894; now Oradell), Maywood (June 30, 1894), Riverside (also June 30, 1894; now River Edge) and Paramus (March 2, 1922). Rochelle Park was formed as a township by an Act of the New Jersey Legislature on November 5, 1929, replacing Midland Township, based on the results of a referendum held on that same day that passed by a 503-69 margin. The main impetus behind the change in name was to avoid confusion with the nearby community of Midland Park. The township was named for the port city of La Rochelle, France.