McMullen County ZIP Codes

McMullen County is a county of Texas.

ZIP codes: 2
Cities & towns: 2
Area codes: 2
Land area: 1,140 sq mi

Every ZIP code in McMullen County

780xx

The complete list of McMullen County, TX ZIP codes with the city each one delivers to.
ZIP code	City
78007	Calliham
78072	Tilden

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Area codes covering McMullen County

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

361 Area code 361
830 Area code 830

Scope every ZIP code recorded in McMullen 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.