The area of King County in Washington is approximately 2,131 square miles.
The largest county in square miles in Kansas is Sedgwick County, with an area of approximately 998 square miles.
Lycoming County with an area of 1,244 square miles.
Shelby County is the largest county in Tennessee by square miles, covering an area of approximately 784 square miles.
Fulton County, GA's area is 534.75 square miles.
Baldwin County, AL's area is 2,027 square miles.
The smallest county in Utah as far as land area is Davis County. Davis County has 304 square miles of land area and 329 square miles of water. The total area of the county is 634 square miles. Morgan County is the smallest in terms of total area with 611 square miles of area, 609 square miles of land and 2 square miles of water. The above figures come from the U.S. Census Bureau.
Knox County which has Knoxville as its county seat has an area of about 526 square miles.
Meade County has an area of 3,482 square miles.
Bastrop County, TX's area is 896 square miles.
Bulloch County's area is 673 square miles.
Coweta County, GA's area is 446 square miles.