30338 -- U.S. ZIP code Municipality (1990): DUNWOODY, Georgia All ZIPs for this municipality (1990): 30338 Population (2000): 28885 Housing Units (2000): 12850 Land area (2000): 10.011368 sq. miles (25.929322 sq. km) Water area (2000): 0.043840 sq. miles (0.113546 sq. km) Total area (2000): 10.055208 sq. miles (26.042868 sq. km) Located within: Georgia (GA) Location: 33.942751 N, 84.317694 W