30815 -- U.S. ZIP code Municipality (1990): HEPHZIBAH, Georgia All ZIPs for this municipality (1990): 30815 Population (2000): 37487 Housing Units (2000): 13439 Land area (2000): 140.627668 sq. miles (364.223973 sq. km) Water area (2000): 0.481776 sq. miles (1.247794 sq. km) Total area (2000): 141.109444 sq. miles (365.471767 sq. km) Located within: Georgia (GA) Location: 33.321570 N, 82.088724 W