Every ZIP code in Walworth County

574xx–576xx

The complete list of Walworth County, SD ZIP codes with the city each one delivers to.
ZIP code	City
57420	Akaska
57452	Java
57472	Selby
57601	Mobridge
57631	Glenham

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Walworth County

Area codes covering Walworth County

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

Where Walworth County's ZIP codes sit

Each point is the reference point of one Walworth 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 Walworth 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.