Helmetta, NJ -- U.S. borough in New Jersey Population (2000): 1825 Housing Units (2000): 769 Land area (2000): 0.847416 sq. miles (2.194798 sq. km) Water area (2000): 0.050333 sq. miles (0.130363 sq. km) Total area (2000): 0.897749 sq. miles (2.325161 sq. km) FIPS code: 30840 Located within: New Jersey (NJ), FIPS 34 Location: 40.379507 N, 74.420998 W ZIP Codes (1990): 08828 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Helmetta, NJ Helmetta