30187 -- U.S. ZIP code Municipality (1990): WINSTON, Georgia All ZIPs for this municipality (1990): 30187 Population (2000): 6090 Housing Units (2000): 2215 Land area (2000): 30.976905 sq. miles (80.229811 sq. km) Water area (2000): 0.020847 sq. miles (0.053994 sq. km) Total area (2000): 30.997752 sq. miles (80.283805 sq. km) Located within: Georgia (GA) Location: 33.670405 N, 84.838093 W