Sierra County, California

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Sierra County is a county located in the Sierra Nevada of the U.S. state of California, northeast of Sacramento on the border with Nevada. As of 2000 the population was 3,555. The county seat is Downieville.

The only incorporated city in the county is Loyalton.



Sierra County was formed from parts of Yuba County in 1852. The county derives its name from the Sierra Nevada.


According to the U.S. Census Bureau, the county has a total area of 962 square miles (2,491 km²), of which 953 square miles (2,469 km²) is land and 9 square miles (22 km²) (0.89%) is water.

Cities and towns

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