Morrow County ZIP Codes

Morrow County is a county of Oregon.

ZIP codes: 5
Cities & towns: 5
Area codes: 2
Land area: 2,031 sq mi

Every ZIP code in Morrow County

978xx

The complete list of Morrow County, OR ZIP codes with the city each one delivers to.
ZIP code	City
97818	Boardman
97836	Heppner
97839	Lexington
97843	Ione
97844	Irrigon

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Morrow County

Area codes covering Morrow County

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

Where Morrow County's ZIP codes sit

Each point is the reference point of one Morrow 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 Morrow 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.