Every ZIP code in Sierra County

959xx–961xx

The complete list of Sierra County, CA ZIP codes with the city each one delivers to.
ZIP code	City
95910	Alleghany
95936	Downieville
95944	Goodyears Bar
96118	Loyalton
96124	Calpine
96125	Sierra City
96126	Sierraville

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Sierra County codes above are listed without a column we would have to invent.

Cities and towns in Sierra County

A further 6 places in Sierra County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Sierra County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Sierra County's ZIP codes sit

Each point is the reference point of one Sierra County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope every ZIP code recorded in Sierra County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.