30285 -- U.S. ZIP code Municipality (1990): THE ROCK, Georgia All ZIPs for this municipality (1990): 30285 Population (2000): 606 Housing Units (2000): 233 Land area (2000): 16.061870 sq. miles (41.600051 sq. km) Water area (2000): 0.083379 sq. miles (0.215950 sq. km) Total area (2000): 16.145249 sq. miles (41.816001 sq. km) Located within: Georgia (GA) Location: 32.995865 N, 84.250924 W