31020 -- U.S. ZIP code Municipality (1990): DRY BRANCH, Georgia All ZIPs for this municipality (1990): 31020 Population (2000): 3198 Housing Units (2000): 1295 Land area (2000): 100.329007 sq. miles (259.850925 sq. km) Water area (2000): 0.498598 sq. miles (1.291362 sq. km) Total area (2000): 100.827605 sq. miles (261.142287 sq. km) Located within: Georgia (GA) Location: 32.719907 N, 83.490500 W