02790 -- U.S. ZIP code Municipality (1990): WESTPORT, Massachusetts All ZIPs for this municipality (1990): 02790 Population (2000): 14649 Housing Units (2000): 6295 Land area (2000): 55.950538 sq. miles (144.911222 sq. km) Water area (2000): 6.734292 sq. miles (17.441736 sq. km) Total area (2000): 62.684830 sq. miles (162.352958 sq. km) Located within: Massachusetts (MA) Location: 41.602517 N, 71.089046 W