ZIP Code 51055

51055 is one of Iowa's ZIP codes, delivering to addresses in Sloan, Woodbury County.

City: Sloan
County: Woodbury County
State: Iowa
Prefix: 510xx

Where this code sits

51055 is part of the 510xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sloan.

Sloan Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51055 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51055

The ZIP codes whose reference points sit closest to 51055.
ZIP code	Distance	Delivers to
ZIP code 51063	6.7 mi	Whiting, IA
ZIP code 51052	6.7 mi	Salix, IA
ZIP code 51026	8.4 mi	Hornick, IA
ZIP code 51102	9.8 mi	Sioux City, IA
ZIP code 51015	10 mi	Climbing Hill, IA
ZIP code 68039	11 mi	Macy, NE
ZIP code 68071	12 mi	Winnebago, NE
ZIP code 51054	13 mi	Sergeant Bluff, 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 51055, plotted from its record coordinates.

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

Scope ZIP code 51055. 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.