It is about 2,157 square miles or 5,586 square kilometres, and is the third largest county in Ireland.
Jackson County in Florida covers approximately 917 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.
The smallest county in Texas is Rockwall County, which is about 147 square miles in size.
There are 2,569 square miles in Lincoln County, Nevada.
Hennepin County, Minnesota is 606 square miles.
Fulton County, GA's area is 534.75 square miles.
Baldwin County, AL's area is 2,027 square miles.
Loudoun County, Virginia has a land area of approximately 520 square miles.
Fayette County, Tennessee is 706 square miles.