Sierra County:
Cities in Sierra County
Loyalton
About Sierra County:
Sierra County is a county located in the U.S. state of California. As of the 2010 census, the population of Sierra County was 3,240 making it the second-least populous county in California. The county seat is Downieville, and the only incorporated city is Loyalton. The county is located in the Sierra Nevada, northeast of Sacramento on the border with Nevada.