Worth County ZIP Codes

Worth County is a county of Iowa.

ZIP codes: 7
Cities & towns: 7
Area codes: 1
Land area: 400 sq mi

Every ZIP code in Worth County

504xx

The complete list of Worth County, IA ZIP codes with the city each one delivers to.
ZIP code	City
50434	Fertile
50440	Grafton
50444	Hanlontown
50446	Joice
50448	Kensett
50456	Manly
50459	Northwood

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Worth County

Area codes covering Worth County

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

641 Area code 641

Where Worth County's ZIP codes sit

Each point is the reference point of one Worth 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 Worth 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.