Belmar, NJ -- U.S. borough in New Jersey Population (2000): 6045 Housing Units (2000): 3996 Land area (2000): 1.020817 sq. miles (2.643903 sq. km) Water area (2000): 0.673353 sq. miles (1.743976 sq. km) Total area (2000): 1.694170 sq. miles (4.387879 sq. km) FIPS code: 04930 Located within: New Jersey (NJ), FIPS 34 Location: 40.178342 N, 74.022446 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Belmar, NJ Belmar