436 square miles
Gwinnett County, Georgia is 437 square miles.
Clinch County
It is Ware County with 903 square miles.
The are of Fulton County, Georgia is 535 square miles.
Houston County, Georgia covers an area of 380 square miles.
Ware County, Georgia covers 906.31 square miles.
Bulloch County's area is 673 square miles.
151 square miles.
Berrien County, GA's area is 458 square miles.
At 903 square miles it is Georgia's largest county in total area.
Total square miles = 59,424.8 Total square miles (land) = 57,906.1 Total square miles (water) = 1,518.6 (Data from The 2004 Georgia County Guide)