Sponsored Listings:
Alleghany Post Office
356 Main St
Alleghany, California 95910
Camptonville Post Office
15318 Cleveland Ave
Camptonville, California 95922
Downieville Post Office
301 Main St
Downieville, California 95936
Goodyears Bar Post Office
22 Post Office Spur
Goodyears Bar, California 95944
Loyalton Post Office
500 Main St
Loyalton, California 96118
Sattley Post Office
131 County Rd
Calpine, California 96124
Sierra City Post Office
215 Main St
Sierra City, California 96125
Sierraville Post Office
306 Lincoln St
Sierraville, California 96126
Sierra County
There are 8 US Post Offices in Sierra County serving a total of 3,597 residents equating to 450 residents per post office. It's estimated that approximately 5,741 packages are handled across the 8 county post offices annually. Sierra County is a county located in the U.S. state of California. As of the 2010 census, the population 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.