Willacy County ZIP Codes

Willacy County is a county of Texas.

ZIP codes: 7
Cities & towns: 7
Area codes: 1
Land area: 591 sq mi

Every ZIP code in Willacy County

785xx

The complete list of Willacy County, TX ZIP codes with the city each one delivers to.
ZIP code	City
78561	Lasara
78569	Lyford
78574	Mission
78580	Raymondville
78590	San Perlita
78594	Sebastian
78598	Port Mansfield

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Willacy County

A further 3 places in Willacy 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 Willacy County

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

956 Area code 956

Where Willacy County's ZIP codes sit

Each point is the reference point of one Willacy 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 Willacy 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.