Sierra County, California ZIP Codes

8 ZIP Codes

Zip Code
City
Population ↓
96118Loyalton1,328
95960North San Juan540
96124Calpine387
96126Sierraville351
96125Sierra City263
95936Downieville144
95944Goodyears Bar122
95910Alleghany19

Overview of ZIP Codes in Sierra County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
8
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 8 ZCTAs in Sierra County, California (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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