30428 -- U.S. ZIP code Municipality (1990): GLENWOOD, Georgia All ZIPs for this municipality (1990): 30428 Population (2000): 2470 Housing Units (2000): 1169 Land area (2000): 140.121018 sq. miles (362.911755 sq. km) Water area (2000): 0.166599 sq. miles (0.431490 sq. km) Total area (2000): 140.287617 sq. miles (363.343245 sq. km) Located within: Georgia (GA) Location: 32.190739 N, 82.691153 W