Crosswicks is an unincorporated community located within Chesterfield Township in Burlington County, New Jersey, United States. The area is served as United States Postal Service ZIP code 08515. As of the 2000 United States Census, the population for ZIP Code Tabulation Area 08515 was 290. Chesterfield Township comprises three distinct communities: Chesterfield, Crosswicks and Sykesville. The area was first settled in 1677, when a group primarily consisting of Quakers settled in the area of Crosswicks, the oldest of the Chesterfield's three villages.