30139 -- U.S. ZIP code Municipality (1990): FAIRMOUNT, Georgia All ZIPs for this municipality (1990): 30139 Population (2000): 3537 Housing Units (2000): 1454 Land area (2000): 70.436693 sq. miles (182.430189 sq. km) Water area (2000): 0.053894 sq. miles (0.139585 sq. km) Total area (2000): 70.490587 sq. miles (182.569774 sq. km) Located within: Georgia (GA) Location: 34.434629 N, 84.701338 W