Martin County ZIP Codes

Martin County is a county of Minnesota.

ZIP codes: 10
Cities & towns: 10
Area codes: 2
Land area: 712 sq mi

Every ZIP code in Martin County

560xx–561xx

The complete list of Martin County, MN ZIP codes with the city each one delivers to.
ZIP code	City
56031	Fairmont
56039	Granada
56075	Northrop
56088	Truman
56121	Ceylon
56127	Dunnell
56162	Ormsby
56171	Sherburn
56176	Trimont
56181	Welcome

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Martin County

Area codes covering Martin County

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

Where Martin County's ZIP codes sit

Each point is the reference point of one Martin 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 Martin 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.