The Barnegat Peninsula, also known as the Island Beach Peninsula or Barnegat Bay Island and colloquially as "the barrier island", is a 20-mile (32 km) long, narrow barrier peninsula located on the Jersey Shore in Ocean County, New Jersey, United States, that divides the Barnegat Bay from the Atlantic Ocean. It is a vacation destination and summer colony area and is heavily dependent on tourism, real estate and fishing.

Lavallette is a borough situated on the Jersey Shore, in Ocean County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 1,787, a decrease of 88 (−4.7%) from the 2010 census count of 1,875, which in turn had reflected a decline of 790 (−29.6%) from the 2,665 counted in the 2000 census. Lavallette is situated on the Barnegat Peninsula, a long, narrow barrier peninsula that separates Barnegat Bay from the Atlantic Ocean.