30173 -- U.S. ZIP code Municipality (1990): SILVER CREEK, Georgia All ZIPs for this municipality (1990): 30173 Population (2000): 6143 Housing Units (2000): 2329 Land area (2000): 31.603372 sq. miles (81.852354 sq. km) Water area (2000): 0.042329 sq. miles (0.109632 sq. km) Total area (2000): 31.645701 sq. miles (81.961986 sq. km) Located within: Georgia (GA) Location: 34.145931 N, 85.143427 W