San Bernardino County is the largest county in California, and all of the continental United States. It has 20,105 square miles.
The largest county in the United States is San Bernardino County, California with 20,105.32 square miles.
The largest county in South Carolina in terms of square miles is Horry County, with an area of around 1,134 square miles.
The largest county in square miles in Kansas is Sedgwick County, with an area of approximately 998 square miles.
Shelby County is the largest county in Tennessee by square miles, covering an area of approximately 784 square miles.
koochiching county with 3,102.36 sq mi
Nye County is the largest county in Nevada in terms of size, covering approximately 18,147 square miles.
Osage County is the largest county in Oklahoma, measuring approximately 2,304 square miles.
Nye County in Nevada is one of the largest counties in the United States, covering approximately 18,147 square miles. It is the third-largest county by area in the state of Nevada.
It is Ware County with 903 square miles.
Keweenaw County - 5,966 square miles.
Worcester County with 1,513 square miles.