Lancaster County in Pennsylvania covers approximately 984 square miles.
The area of Crawford County, Michigan, is 556 sq miles (1,440 km2).
Coconino County in Arizona covers approximately 18,661 square miles.
Garrett County is approximately 656 square miles in size.
Martin County, Florida has a total area of 1,557 square miles.
King County, Washington, USA - 2,307 sq miles.
Adair County, KY is 412 sq miles (1,067 km²)
Idaho County is 8,502 sq miles (22,020 km²).
Harney County, OR is 10,226 sq miles (26,485 km²).
Oglethorpe County, Georgia, USA - 442 square miles.
Coos County, OR is 1,806 sq miles (4,678 km²).
Baltimore County, MD is 682 sq miles.
It is 516 sq miles.
Yuma County, AZ is 5,519 sq miles (14,294 km²).
Bullock County, Alabama is 626 sq miles (1,621 km²).
Anson County, NC is 537 sq miles (1,391 km²).
Gillespie County, TX is 1,061 sq miles (2,748 km²).