Iron County ZIP Codes

Iron County is a county of Michigan.

ZIP codes: 7
Cities & towns: 7
Area codes: 1
Land area: 1,166 sq mi

Every ZIP code in Iron County

499xx

The complete list of Iron County, MI ZIP codes with the city each one delivers to.
ZIP code	City
49902	Alpha
49903	Amasa
49915	Caspian
49920	Crystal Falls
49927	Gaastra
49935	Iron River
49964	Stambaugh

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Iron County

A further 2 places in Iron County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Iron County

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

906 Area code 906

Where Iron County's ZIP codes sit

Each point is the reference point of one Iron 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 Iron 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.