30535 -- U.S. ZIP code Municipality (1990): DEMOREST, Georgia All ZIPs for this municipality (1990): 30535 Population (2000): 5804 Housing Units (2000): 2436 Land area (2000): 28.280183 sq. miles (73.245335 sq. km) Water area (2000): 0.233348 sq. miles (0.604369 sq. km) Total area (2000): 28.513531 sq. miles (73.849704 sq. km) Located within: Georgia (GA) Location: 34.573072 N, 83.559922 W