31525 -- U.S. ZIP code Municipality (1990): BRUNSWICK, Georgia All ZIPs for this municipality (1990): 31525 Population (2000): 21516 Housing Units (2000): 8994 Land area (2000): 104.866926 sq. miles (271.604081 sq. km) Water area (2000): 0.264547 sq. miles (0.685174 sq. km) Total area (2000): 105.131473 sq. miles (272.289255 sq. km) Located within: Georgia (GA) Location: 31.260995 N, 81.498329 W