30506 -- U.S. ZIP code Municipality (1990): GAINESVILLE, Georgia All ZIPs for this municipality (1990): 30501 30504 30506 30507 Population (2000): 31610 Housing Units (2000): 12732 Land area (2000): 103.224271 sq. miles (267.349623 sq. km) Water area (2000): 0.196677 sq. miles (0.509391 sq. km) Total area (2000): 103.420948 sq. miles (267.859014 sq. km) Located within: Georgia (GA) Location: 34.346102 N, 83.901003 W