30204 -- U.S. ZIP code Municipality (1990): BARNESVILLE, Georgia All ZIPs for this municipality (1990): 30204 Population (2000): 12240 Housing Units (2000): 4681 Land area (2000): 124.832028 sq. miles (323.313454 sq. km) Water area (2000): 0.546471 sq. miles (1.415353 sq. km) Total area (2000): 125.378499 sq. miles (324.728807 sq. km) Located within: Georgia (GA) Location: 33.054130 N, 84.148624 W