04642 -- U.S. ZIP code Municipality (1990): HARBORSIDE, Maine All ZIPs for this municipality (1990): 04642 Population (2000): 80 Housing Units (2000): 142 Land area (2000): 3.751681 sq. miles (9.716809 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.751681 sq. miles (9.716809 sq. km) Located within: Maine (ME) Location: 44.322421 N, 68.809337 W