Koochiching County ZIP Codes

Koochiching County is a county of Minnesota.

ZIP codes: 11
Cities & towns: 11
Area codes: 1
Land area: 3,105 sq mi

Every ZIP code in Koochiching County

566xx

The complete list of Koochiching County, MN ZIP codes with the city each one delivers to.
ZIP code	City
56627	Big Falls
56629	Birchdale
56649	International Falls
56653	Littlefork
56654	Loman
56658	Margie
56660	Mizpah
56661	Northome
56668	Ranier
56669	Kabetogama
56679	South International Falls

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Koochiching County

A further 5 places in Koochiching 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 Koochiching 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 Koochiching County's ZIP codes sit

Each point is the reference point of one Koochiching 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 Koochiching 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.