Every ZIP code in Bremer County

506xx

The complete list of Bremer County, IA ZIP codes with the city each one delivers to.
ZIP code	City
50622	Denver
50631	Frederika
50647	Janesville
50666	Plainfield
50668	Readlyn
50674	Sumner
50676	Tripoli
50677	Waverly

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Bremer County

Area codes covering Bremer County

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

Where Bremer County's ZIP codes sit

Each point is the reference point of one Bremer 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 Bremer 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.