31098 -- U.S. ZIP code Municipality (1990): ROBINS A F B, Georgia All ZIPs for this municipality (1990): 31098 Population (2000): 5382 Housing Units (2000): 1455 Land area (2000): 17.834382 sq. miles (46.190836 sq. km) Water area (2000): 0.477179 sq. miles (1.235887 sq. km) Total area (2000): 18.311561 sq. miles (47.426723 sq. km) Located within: Georgia (GA) Location: 32.614742 N, 83.598292 W