ZIP Code 56257

56257 is one of Minnesota's ZIP codes, delivering to addresses in Marietta, Lac qui Parle County.

City: Marietta
County: Lac qui Parle County
State: Minnesota
Prefix: 562xx

Where this code sits

56257 is part of the 562xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Marietta.

Marietta Minnesota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 56257 delivers to without sharing its boundary.

320 Area code 320

ZIP codes nearest 56257

The ZIP codes whose reference points sit closest to 56257.
ZIP code	Distance	Delivers to
ZIP code 57237	11 mi	Gary, SD
ZIP code 57259	11 mi	Revillo, SD
ZIP code 56256	12 mi	Madison, MN
ZIP code 56212	14 mi	Bellingham, MN
ZIP code 57246	15 mi	Labolt, SD
ZIP code 56232	18 mi	Dawson, MN
ZIP code 56220	18 mi	Canby, MN
ZIP code 57265	19 mi	Strandburg, SD

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 56257, plotted from its record coordinates.

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

Scope ZIP code 56257. 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.