Every ZIP code in McClain County

730xx–748xx

The complete list of McClain County, OK ZIP codes with the city each one delivers to.
ZIP code	City
73010	Blanchard
73031	Dibble
73065	Newcastle
73080	Purcell
73093	Washington
73095	Wayne
74831	Byars

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in McClain County

Area codes covering McClain County

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

Where McClain County's ZIP codes sit

Each point is the reference point of one McClain 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 McClain 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.