There are 8 zip codes in Sierra County, California. The most populated is 96118, located in Loyalton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
961181,581Loyalton
95960594North San Juan
96124320Calpine
96125234Sierra City
96126227Sierraville
95910148Alleghany
95936121Downieville
9594465Goodyears Bar

Zip Codes in Sierra County, California by Population (2024)