Iosco County ZIP Codes

Iosco County is a county of Michigan.

ZIP codes: 8
Cities & towns: 7
Area codes: 1
Land area: 549 sq mi

Every ZIP code in Iosco County

487xx

The complete list of Iosco County, MI ZIP codes with the city each one delivers to.
ZIP code	City
48730	East Tawas
48739	Hale
48743	Long Lake
48748	National City
48750	Oscoda
48763	Tawas City
48764	Tawas City
48770	Whittemore

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Iosco County

A further 4 places in Iosco 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 Iosco County

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

989 Area code 989

Where Iosco County's ZIP codes sit

Each point is the reference point of one Iosco 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 Iosco 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.