30253 -- U.S. ZIP code Municipality (1990): MC DONOUGH, Georgia All ZIPs for this municipality (1990): 30253 Population (2000): 26597 Housing Units (2000): 9770 Land area (2000): 48.640218 sq. miles (125.977581 sq. km) Water area (2000): 0.156292 sq. miles (0.404794 sq. km) Total area (2000): 48.796510 sq. miles (126.382375 sq. km) Located within: Georgia (GA) Location: 33.455031 N, 84.172159 W