31738 -- U.S. ZIP code Municipality (1990): COOLIDGE, Georgia All ZIPs for this municipality (1990): 31738 Population (2000): 1896 Housing Units (2000): 886 Land area (2000): 63.203780 sq. miles (163.697032 sq. km) Water area (2000): 0.243619 sq. miles (0.630971 sq. km) Total area (2000): 63.447399 sq. miles (164.328003 sq. km) Located within: Georgia (GA) Location: 31.012042 N, 83.872184 W