ZIP Code 56731

56731 is one of Minnesota's ZIP codes, delivering to addresses in Humboldt, Kittson County.

City: Humboldt
County: Kittson County
State: Minnesota
Prefix: 567xx

Where this code sits

56731 is part of the 567xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Humboldt.

Humboldt Minnesota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 56731 delivers to without sharing its boundary.

218 Area code 218

ZIP codes nearest 56731

The ZIP codes whose reference points sit closest to 56731.
ZIP code	Distance	Delivers to
ZIP code 56755	3.9 mi	Saint Vincent, MN
ZIP code 56740	7.3 mi	Noyes, MN
ZIP code 58271	9.9 mi	Pembina, ND
ZIP code 56728	12 mi	Hallock, MN
ZIP code 58216	18 mi	Bathgate, ND
ZIP code 58238	19 mi	Hamilton, ND
ZIP code 56735	21 mi	Lancaster, MN
ZIP code 56733	21 mi	Kennedy, MN

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 56731, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 56731. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.