Summit, NJ -- U.S. city in New Jersey Population (2000): 21131 Housing Units (2000): 8146 Land area (2000): 6.053503 sq. miles (15.678499 sq. km) Water area (2000): 0.021436 sq. miles (0.055519 sq. km) Total area (2000): 6.074939 sq. miles (15.734018 sq. km) FIPS code: 71430 Located within: New Jersey (NJ), FIPS 34 Location: 40.716201 N, 74.362459 W ZIP Codes (1990): 07901 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Summit, NJ Summit