Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Long Hill Township is a township in Morris County, New Jersey, United States. As of the United States 2000 Census, the township population was 8777.Long Hill Township was incorporated as Passaic Township on March 23, 1866. On September 1, 1922, part of what was then Passaic Township was taken to form Harding Township. On November 3, 1992, by a 1,901- 1,821 margin, the voters elected to change the name of the municipality to Long Hill Township, a change largely driven by the desire to avoid confusion with the City of Passaic, some 22 miles (35 km) away.