Hamilton Township is a township in Atlantic County, New Jersey, United States. As of the 2010 United States Census, the township's population was 26,503, reflecting an increase of 6,004 (+29.3%) from the 20,499 counted in the 2000 Census, which had in turn increased by 4,487 (+28.0%) from the 16,012 counted in the 1990 Census. The Township of Hamilton was incorporated by the New Jersey Legislature on February 5, 1813.
The township calls itself "New Jersey's Largest Municipality" on its stationery and its website. At , Hamilton Township has the largest land area of any municipality in New Jersey. However, with a total area of it is the second-largest municipality in New Jersey in terms of total area, more than smaller than neighboring Galloway Township, which has a total area of .