Shasta County, California, USA - 3,847 square miles.
Lake County, California has a total area of approximately 1,329 square miles.
The biggest county in the United States is San Bernardino County in California, covering approximately 20,105 square miles.
San Mateo County in California has a total area of around 741 square miles.
Shelby County is the largest county in Tennessee by square miles, covering an area of approximately 784 square miles.
The largest county in square miles in Kansas is Sedgwick County, with an area of approximately 998 square miles.
Kern County, CA covers 8,161 square miles.
~49 square miles.
Lake County, California has a total area of approximately 1,329 square miles.
Orange County, California, USA - 948 square miles.
There is no strict definition of "Southern California." But if you want to count LA County, San Diego County, Orange County, Riverside County, San Bernardino County, Ventura County, and Santa Barbara County; then Southern California is about 40,892 square miles. If you add in Kern County, San Luis Obispo County, and Imperial County...then Southern California is about 56,512 square miles.
The biggest county in the United States is San Bernardino County in California, covering approximately 20,105 square miles.
San Francisco County, with 47 square miles. Next is Santa Cruz County with 446 square miles.
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San Bernardino County is the largest county in California, and all of the continental United States. It has 20,105 square miles.
The largest California county by size is San Bernardino County, which is 20,062 square miles.
Alpine County, California has an area of 739 square miles and a population of 1,238, making it the least populated county in California
It has a total area of 1,463 square miles.