Lake County ZIP Codes

Lake County is a county of California.

ZIP codes: 15
Cities & towns: 15
Area codes: 2
Land area: 1,255 sq mi

Every ZIP code in Lake County

954xx

The complete list of Lake County, CA ZIP codes with the city each one delivers to.
ZIP code	City
95422	Clearlake
95423	Clearlake Oaks
95424	Clearlake Park
95426	Cobb
95435	Finley
95443	Glenhaven
95451	Kelseyville
95453	Lakeport
95457	Lower Lake
95458	Lucerne
95461	Middletown
95464	Nice
95467	Hidden Valley Lake
95485	Upper Lake
95493	Witter Springs

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Lake County

A further 13 places in Lake 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 Lake County

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

Where Lake County's ZIP codes sit

Each point is the reference point of one Lake 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 Lake 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.