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, [9] an increase of 221 (+14.2%) from the 2010 census count of 1,553, [18] [19] which in turn reflected a decline of 63 (−3.9%) from the 1,616 counted in the 2000 census. [20]