Corson County ZIP Codes

Corson County is a county of South Dakota.

ZIP codes: 10
Cities & towns: 10
Area codes: 1
Land area: 2,470 sq mi

Every ZIP code in Corson County

576xx

The complete list of Corson County, SD ZIP codes with the city each one delivers to.
ZIP code	City
57621	Bullhead
57634	Keldron
57639	Little Eagle
57641	Mc Intosh
57642	Mc Laughlin
57645	Morristown
57657	Trail City
57658	Wakpala
57659	Walker
57660	Watauga

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Corson County

A further 9 places in Corson 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 Corson County

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

605 Area code 605

Where Corson County's ZIP codes sit

Each point is the reference point of one Corson 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 Corson 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.