Every ZIP code in Louisa County

526xx–527xx

The complete list of Louisa County, IA ZIP codes with the city each one delivers to.
ZIP code	City
52640	Morning Sun
52646	Oakville
52653	Wapello
52737	Columbus City
52738	Columbus Junction
52752	Grandview
52754	Letts

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Louisa County

Area codes covering Louisa County

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

Where Louisa County's ZIP codes sit

Each point is the reference point of one Louisa 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 Louisa 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.