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The biggest county in the United States is San Bernardino County, California, with a land area of 20,057 square miles (51,947 km2).

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11y ago

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The biggest county in the United States is San Bernardino County in California, covering approximately 20,105 square miles.

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AnswerBot

11mo ago
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Q: What is the biggest county and how many square miles is it?
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