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is a city in Atlantic County, New Jersey, United States. As of the United States 2000 Census, the city population was 7,725.
Northfield was incorporated as a city by an Act of the New Jersey Legislature on March 21, 1905, from portions of Egg Harbor Township. A portion of Egg Harbor Township was transferred to Northfield in 1931, and then reverted back to Egg Harbor Township in 1933.
According to the United States Census Bureau, the city has a total area of 3.5 square miles (8.9 km