ZIP Code 51555

51555 is one of Iowa's ZIP codes, delivering to addresses in Missouri Valley, Harrison County.

City: Missouri Valley
County: Harrison County
State: Iowa
Prefix: 515xx

Where this code sits

51555 is part of the 515xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Missouri Valley.

Missouri Valley Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51555 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51555

The ZIP codes whose reference points sit closest to 51555.
ZIP code	Distance	Delivers to
ZIP code 51556	7.0 mi	Modale, IA
ZIP code 51542	7.0 mi	Honey Creek, IA
ZIP code 51546	7.6 mi	Logan, IA
ZIP code 51550	8.9 mi	Magnolia, IA
ZIP code 68023	11 mi	Fort Calhoun, NE
ZIP code 51557	12 mi	Mondamin, IA
ZIP code 51559	13 mi	Neola, IA
ZIP code 68008	14 mi	Blair, NE

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 51555, plotted from its record coordinates.

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

Scope ZIP code 51555. 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.