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is a Township in Camden County, New Jersey, United States. As of the United States 2000 Census, the township population was 14,651.
By an Act of the New Jersey Legislature on February 23, 1865, Haddon Township was incorporated as a township from portions of Newton Township. From the original township the following were subsequently created: Haddonfield (April 6, 1875), Collingswood (May 22, 1888), Woodlynne (March 19, 1901), Haddon Heights (March 2, 1904), Audubon (March 13, 1905) and Oaklyn (also March 13, 1905).
Haddon Township has two exclaves—rare in New Jersey—West Collingswood Heights and West Collingswood Extension. The main portion of the township is colloquially known as
, a name that probably derived from a noted harness racing horse. Haddon Township has an slightly higher number of liquor stores, restaurants which serve alcohol, and bars because the neighboring boroughs of Collingswood, Haddonfield and Haddon Heights prohibit the sale of alcohol.
In 1701, Elizabeth Haddon Estaugh, the daughter of John Haddon, arrived in the American colonies to oversee his large landholdings, which included areas that are now Haddon Township and Haddonfield. The contemporary Newton Township included land that later became part of Oaklyn, Audubon, Audubon Park, Collingswood, Gloucester City, Woodlynne, Camden, Haddon Heights and Haddonfield. Its first European settlers were Irishmen who settled in the area of Newton Creek in 1681. During the 1860s the area began to lose its cohesion, and in 1865, the eastern portion of Newton Township broke away to become Haddon Township.