ZIP Code 51044

51044 is one of Iowa's ZIP codes, delivering to addresses in Oto, Woodbury County.

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

Where this code sits

51044 is part of the 510xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Oto.

Oto Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51044 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51044

The ZIP codes whose reference points sit closest to 51044.
ZIP code	Distance	Delivers to
ZIP code 51056	4.7 mi	Smithland, IA
ZIP code 51019	6.9 mi	Danbury, IA
ZIP code 51051	7.5 mi	Rodney, IA
ZIP code 51034	8.2 mi	Mapleton, IA
ZIP code 51004	8.6 mi	Anthon, IA
ZIP code 51026	11 mi	Hornick, IA
ZIP code 51015	13 mi	Climbing Hill, IA
ZIP code 51010	13 mi	Castana, 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 51044, plotted from its record coordinates.

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

Scope ZIP code 51044. 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.