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is a Township in Ocean County, New Jersey, United States. As of the United States 2000 Census the population was 15,270.
on March 10, 1846, from portions of both Dover Township (now Toms River Township) and Stafford Township, while the area was still part of Monmouth County. It became part of the newly-formed Ocean County on February 15, 1850. Portions of the township were taken to form Lacey Township (March 23, 1871), Ocean Township (April 13, 1876), Harvey Cedars (December 13, 1894) and Long Beach Township (March 23, 1899). Union Township changed its name to Barnegat Township as of January 1, 1977.
Barnegat CDP (2000 Census population of 1,690) is a census-designated place and unincorporated area located within Barnegat Township. Ocean Acres (13,155) is a census-designated place and unincorporated area split between Barnegat Township and Stafford Township.
According to the United States Census Bureau, the township has a total area of 40.8 square miles (105.7 km²), of which, 34.7 square miles (89.8 km²) of it is land and 6.2 square miles (16.0 km²) of it (15.09%) is water.
The municipality borders the Ocean County municipalities of Lacey Township, Ocean Township, Long Beach Township, Harvey Cedars, Stafford Township and Woodland Township in Burlington County.