Cumberland -- U.S. County in New Jersey Population (2000): 146438 Housing Units (2000): 52863 Land area (2000): 489.297022 sq. miles (1267.273415 sq. km) Water area (2000): 187.294976 sq. miles (485.091741 sq. km) Total area (2000): 676.591998 sq. miles (1752.365156 sq. km) Located within: New Jersey (NJ), FIPS 34 Location: 39.399565 N, 75.090565 W Headwords: Cumberland Cumberland, NJ Cumberland County Cumberland County, NJ