Long Hill Township is a township in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 8,629, a decrease of 73 (−0.8%) from the 2010 census count of 8,702, which in turn reflected a decline of 75 (−0.9%) from the 8,777 counted in the 2000 census.
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