About This Place
Riverdale is a Borough in Morris County, New Jersey, United States. As of the 2010 United States Census, the borough population was 3,559.
Riverdale was incorporated as a borough by an Act of the New Jersey Legislature on March 12, 1923, from portions of Pequannock Township, subject to the results of a referendum passed on April 17, 1923.
Riverdale is located at 40°59′24″N 74°18′37″W / 40.990032°N 74.310236°W / 40.990032; -74.310236 (40.990032, -74.310236).