It is Ware County with 903 square miles.
The largest is Nye County with 18,147 square miles.
The largest is Berkeley County with 1,228 square miles.
Keweenaw County - 5,966 square miles.
Shelby County with 755 square miles.
Worcester County with 1,513 square miles.
Brewster County is the largest county in Texas at 6,193 square miles.
The largest county in the state of New York is St. Lawrence County which covers about 2,821 square miles.
Osage County: 2,251 square miles.
what is the largest county in size measuring square miles in illinios
Lycoming County with an area of 1,244 square miles.
Las Animas County at 4,775 square miles.
San Bernardino County is the largest county in California, and all of the continental United States. It has 20,105 square miles.