King County, Washington, USA - 2,307 sq miles.
King County, WA is 2,307 sq miles (5,975 km²).
Adair County, KY is 412 sq miles (1,067 km²)
Harney County, OR is 10,226 sq miles (26,485 km²).
Oglethorpe County, Georgia, USA - 442 square miles.
Baltimore County, MD is 682 sq miles.
Idaho County is 8,502 sq miles (22,020 km²).
Coos County, OR is 1,806 sq miles (4,678 km²).
It is 516 sq miles.
Geauga County, OH is 408 sq miles (1,057 km²).
Johnson County, Illinois, USA - 349 square miles.
Tarrant County, TX is 897 sq miles (2,323 km²).
Cherry County, Nebraska is 6,010 sq miles (15,566 km²).