The Borough of Hopatcong is a community of just under 16,000 residents. Originally called the "Borough of Brooklyn", the Borough split from Byram Township on 2 April 1898 and changed its name to the Borough of Hopatcong in 1901. A major annexation of additional land from Byram Township took place in 1922.The Borough is in northwestern New Jersey, situated on the western and northern shores of Lake Hopatcong, the largest lake in New Jersey. It occupies the southeastern corner of Sussex County, and abuts Morris County to the east and south. The Borough is easily reached via Interstate 80 (use exit 28) and State Highways 206 and 46.