Clay County ZIP Codes

Clay County is a county of Missouri.

ZIP codes: 22
Cities & towns: 8
Area codes: 2
Land area: 398 sq mi

Every ZIP code in Clay County

640xx–641xx

The complete list of Clay County, MO ZIP codes with the city each one delivers to.
ZIP code	City
64024	Excelsior Springs
64048	Holt
64060	Kearney
64068	Liberty
64069	Liberty
64072	Missouri City
64073	Mosby
64089	Smithville
64116	Kansas City
64117	Kansas City
64118	Kansas City
64119	Kansas City
64144	Kansas City
64155	Kansas City
64156	Kansas City
64157	Kansas City
64158	Kansas City
64161	Kansas City
64162	Kansas City
64165	Kansas City
64166	Kansas City
64167	Kansas City

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Clay County

Area codes covering Clay County

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

Where Clay County's ZIP codes sit

Each point is the reference point of one Clay 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 Clay 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.