Barrington is a borough in Camden County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 6,983, reflecting a decline of 101 from the 7,084 counted in the 2000 Census, which had in turn increased by 310 from the 6,774 counted in the 1990 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.Barrington was incorporated as a borough on March 27, 1917, from portions of the now-defunct Centre Township, based on the results of a referendum held on April 17, 1917. Portions of the borough were taken on March 24, 1926, to form Lawnside.