Every ZIP code in Day County

572xx–574xx

The complete list of Day County, SD ZIP codes with the city each one delivers to.
ZIP code	City
57219	Bristol
57239	Grenville
57261	Roslyn
57273	Waubay
57274	Webster
57422	Andover
57468	Pierpont

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Day County

Area codes covering Day County

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

Where Day County's ZIP codes sit

Each point is the reference point of one Day 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 Day 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.