31824 -- U.S. ZIP code Municipality (1990): PRESTON, Georgia All ZIPs for this municipality (1990): 31824 Population (2000): 1698 Housing Units (2000): 768 Land area (2000): 108.453113 sq. miles (280.892260 sq. km) Water area (2000): 0.514434 sq. miles (1.332379 sq. km) Total area (2000): 108.967547 sq. miles (282.224639 sq. km) Located within: Georgia (GA) Location: 32.051618 N, 84.534197 W