Every ZIP code in Hancock County

504xx

The complete list of Hancock County, IA ZIP codes with the city each one delivers to.
ZIP code	City
50423	Britt
50430	Corwith
50432	Crystal Lake
50438	Garner
50439	Goodell
50447	Kanawha
50449	Klemme
50484	Woden

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Hancock County

Area codes covering Hancock County

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

Where Hancock County's ZIP codes sit

Each point is the reference point of one Hancock 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 Hancock 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.