30134 -- U.S. ZIP code Municipality (1990): DOUGLASVILLE, Georgia All ZIPs for this municipality (1990): 30134 30135 Population (2000): 31836 Housing Units (2000): 11681 Land area (2000): 49.501595 sq. miles (128.208536 sq. km) Water area (2000): 0.148383 sq. miles (0.384311 sq. km) Total area (2000): 49.649978 sq. miles (128.592847 sq. km) Located within: Georgia (GA) Location: 33.769636 N, 84.749679 W