Newfield is a borough in Gloucester County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 1,774, an increase of 221 from the 2010 census count of 1,553, which in turn reflected a decline of 63 from the 1,616 counted in the 2000 census. Newfield was formed as a borough by the New Jersey Legislature on March 8, 1924, from portions of Franklin Township, based on the results of a referendum held on April 1, 1924.