ZIP Code 55609

55609 is one of Minnesota's ZIP codes, delivering to addresses in Knife River, Lake County.

City: Knife River
County: Lake County
State: Minnesota
Prefix: 556xx

Where this code sits

55609 is part of the 556xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Knife River.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 55609 delivers to without sharing its boundary.

218 Area code 218

ZIP codes nearest 55609

The ZIP codes whose reference points sit closest to 55609.
ZIP code	Distance	Delivers to
ZIP code 55616	7.5 mi	Two Harbors, MN
ZIP code 55804	13 mi	Duluth, MN
ZIP code 55803	16 mi	Duluth, MN
ZIP code 55812	17 mi	Duluth, MN
ZIP code 55805	18 mi	Duluth, MN
ZIP code 55802	19 mi	Duluth, MN
ZIP code 55801	20 mi	Duluth, MN
ZIP code 55814	20 mi	Duluth, 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 55609, plotted from its record coordinates.

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

Scope ZIP code 55609. 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.