02642 -- U.S. ZIP code Municipality (1990): EASTHAM, Massachusetts All ZIPs for this municipality (1990): 02642 Population (2000): 5453 Housing Units (2000): 5535 Land area (2000): 13.986895 sq. miles (36.225891 sq. km) Water area (2000): 0.362881 sq. miles (0.939857 sq. km) Total area (2000): 14.349776 sq. miles (37.165748 sq. km) Located within: Massachusetts (MA) Location: 41.844087 N, 69.989214 W