30450 -- U.S. ZIP code Municipality (1990): PORTAL, Georgia All ZIPs for this municipality (1990): 30450 Population (2000): 2829 Housing Units (2000): 1186 Land area (2000): 62.063779 sq. miles (160.744444 sq. km) Water area (2000): 0.763277 sq. miles (1.976878 sq. km) Total area (2000): 62.827056 sq. miles (162.721322 sq. km) Located within: Georgia (GA) Location: 32.555659 N, 81.924202 W