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Sierra County, California
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Sierra County, California Map
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About Sierra County, California
Sierra County is a county located in the U.S. state of California. As of the 2020 census, the population was 3,236, making it California's second-least populous county. The county seat is Downieville; the sole incorporated city is Loyalton. The county is in the Sierra Nevada, northeast of Sacramento on the border with Nevada.
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