Somerville, NJ -- U.S. borough in New Jersey Population (2000): 12423 Housing Units (2000): 4882 Land area (2000): 2.360725 sq. miles (6.114250 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.360725 sq. miles (6.114250 sq. km) FIPS code: 68460 Located within: New Jersey (NJ), FIPS 34 Location: 40.570831 N, 74.605344 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Somerville, NJ Somerville