New Madrid County ZIP Codes

New Madrid County is a county of Missouri.

ZIP codes: 13
Cities & towns: 13
Area codes: 4
Land area: 675 sq mi

Every ZIP code in New Madrid County

638xx

The complete list of New Madrid County, MO ZIP codes with the city each one delivers to.
ZIP code	City
63828	Canalou
63833	Catron
63848	Gideon
63860	Kewanee
63862	Lilbourn
63866	Marston
63867	Matthews
63868	Morehouse
63869	New Madrid
63870	Parma
63873	Portageville
63874	Risco
63878	Tallapoosa

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in New Madrid County

A further 1 place in New Madrid County appears in the postal source without a page of its own; its codes are in the table above and each one links to its own page.

Area codes covering New Madrid County

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

Where New Madrid County's ZIP codes sit

Each point is the reference point of one New Madrid 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 New Madrid 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.