Barrington is a borough in Camden County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 7,075, an increase of 92 from the 2010 census count of 6,983, which in turn reflected a decline of 101 from the 7,084 counted in the 2000 census. The area became known as "Barrington" in the 1880s, when William Simpson, one of the partners that developed the area, chose the name from his home in Great Barrington, Massachusetts.