Marshall County ZIP Codes

Marshall County is a county of Minnesota.

ZIP codes: 11
Cities & towns: 11
Area codes: 1
Land area: 1,775 sq mi

Every ZIP code in Marshall County

567xx

The complete list of Marshall County, MN ZIP codes with the city each one delivers to.
ZIP code	City
56710	Alvarado
56713	Argyle
56724	Gatzke
56727	Grygla
56737	Middle River
56738	Newfolden
56744	Oslo
56757	Stephen
56758	Strandquist
56760	Viking
56762	Warren

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Marshall County

A further 1 place in Marshall County appears in the postal source without a page of its own; its codes are in the table above and each one links to its own page.

Area codes covering Marshall County

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

218 Area code 218

Where Marshall County's ZIP codes sit

Each point is the reference point of one Marshall 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 Marshall 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.