Lassen County ZIP Codes

Lassen County is a county of California.

ZIP codes: 15
Cities & towns: 14
Area codes: 2
Land area: 4,541 sq mi

Every ZIP code in Lassen County

960xx–961xx

The complete list of Lassen County, CA ZIP codes with the city each one delivers to.
ZIP code	City
96009	Bieber
96068	Nubieber
96109	Doyle
96113	Herlong
96114	Janesville
96117	Litchfield
96119	Madeline
96121	Milford
96123	Ravendale
96127	Susanville
96128	Standish
96130	Susanville
96132	Termo
96136	Wendel
96137	Westwood

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Lassen County codes above are listed without a column we would have to invent.

Cities and towns in Lassen County

A further 13 places in Lassen 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 Lassen County

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

Where Lassen County's ZIP codes sit

Each point is the reference point of one Lassen 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 Lassen 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.