30038 -- U.S. ZIP code Municipality (1990): LITHONIA, Georgia All ZIPs for this municipality (1990): 30038 Population (2000): 23693 Housing Units (2000): 8509 Land area (2000): 28.597758 sq. miles (74.067849 sq. km) Water area (2000): 0.162731 sq. miles (0.421472 sq. km) Total area (2000): 28.760489 sq. miles (74.489321 sq. km) Located within: Georgia (GA) Location: 33.676358 N, 84.153815 W