Hopatcong ( hoh-PAT-kong) is a borough in Sussex County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough’s population was 14,362, a grow less of 785 (−5.2%) from the 2010 census put in of 15,147, which in twist reflected a terminate of 741 (−4.7%) from the 15,888 counted in the 2000 Census.

The town of Hopatcong has a rich history, given its membership with New York City. It borders Lake Hopatcong, a partially man-made lake that is now a source of much recreation and desirable real estate, and is the biggest lake in New Jersey. The community, 40 miles (64 km) west of New York City, began as a summer getaway for the wealthy in NYC who primarily sought entrance to the lake. An amusement park, called “Bertrand’s Island”, sprang stirring and was accessible via the lake, trolley or by car through Mount Arlington. The construction of Interstate 80, a highway that stretches from Teaneck, New Jersey, all the mannerism across the country to San Francisco, California, triggered sudden growth in New York City’s suburbs and led to Hopatcong becoming a permanent residential community.
The area had been called “Brookland” in the 19th century and the lake that was expanded to become Lake Hopatcong had been known as “Great Pond” or “Brookland Pond”. During the 1830s, the publish of the community had been modified to “Brooklyn”, to be consistent with the spelling of the city upon New York’s Long Island. Hopatcong was originally acknowledged as the Town of Brooklyn on April 2, 1898, from portions of Byram Township. On March 22, 1901, the Borough of Hopatcong replaced Brooklyn. In 1922, residents of Byram Cove, Northwood, and further areas to the west of the native land area of the borough, voted to leave Byram Township and partner Hopatcong, leaving the Borough bearing in mind its current borders.

While the descent of the borough’s read out is unclear, it is said to derive from Native American phrases variously meaning “stone higher than water” or “pipestone”, among additional variations.

According to the United States Census Bureau, the borough had a total area of 12.35 square miles (31.99 km), including 10.89 square miles (28.21 km²) of home and 1.46 square miles (3.78 km) of water (11.83%).