The largest County in Maine is Aroostook, measuring 6,829 square miles.
Putnam County, Florida has a total area of 827 square miles.
Approx 20105 square miles.
Harney County, OR is 10,226 sq miles (26,485 km²).
Boise, Idaho is 80.05 sq miles (207.3 km²).
Jackson county is 100.6 square miles
Marquette County, Michigan is 3,425 square miles.
Onondaga County, NY is 806 square miles.
Darlington County, SC is 567 square miles.
Tillamook County, Oregon is 1,133 square miles.
Lincoln County is 4 831 square miles.
Hennepin County, Minnesota is 606 square miles.
Rockwall County: 129 square miles.
Fulton County, GA's area is 534.75 square miles.
Baldwin County, AL's area is 2,027 square miles.
Loudon County, TN: 247 square miles.Loudon County, VA: 521 square miles.
Fayette County, Tennessee is 706 square miles.