ZIP Code 51355

51355 is one of Iowa's ZIP codes, delivering to addresses in Okoboji, Dickinson County.

City: Okoboji
County: Dickinson County
State: Iowa
Prefix: 513xx

Where this code sits

51355 is part of the 513xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Okoboji.

Okoboji Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51355 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51355

The ZIP codes whose reference points sit closest to 51355.
ZIP code	Distance	Delivers to
ZIP code 51331	1.8 mi	Arnolds Park, IA
ZIP code 51360	2.9 mi	Spirit Lake, IA
ZIP code 51351	4.9 mi	Milford, IA
ZIP code 51364	9.3 mi	Terril, IA
ZIP code 51363	10 mi	Superior, IA
ZIP code 51347	10 mi	Lake Park, IA
ZIP code 51334	16 mi	Estherville, IA
ZIP code 51345	16 mi	Harris, IA

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 51355, plotted from its record coordinates.

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

Scope ZIP code 51355. 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.