Nicollet County ZIP Codes

Nicollet County is a county of Minnesota.

ZIP codes: 5
Cities & towns: 5
Area codes: 2
Land area: 449 sq mi

Every ZIP code in Nicollet County

560xx

The complete list of Nicollet County, MN ZIP codes with the city each one delivers to.
ZIP code	City
56003	Mankato
56021	Courtland
56054	Lafayette
56074	Nicollet
56082	Saint Peter

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Nicollet County

A further 1 place in Nicollet 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 Nicollet County

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

Where Nicollet County's ZIP codes sit

Each point is the reference point of one Nicollet 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 Nicollet 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.