ZIP Code 51004

51004 is one of Iowa's ZIP codes, delivering to addresses in Anthon, Woodbury County.

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

Where this code sits

51004 is part of the 510xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Anthon.

Anthon Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51004 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51004

The ZIP codes whose reference points sit closest to 51004.
ZIP code	Distance	Delivers to
ZIP code 51016	8.4 mi	Correctionville, IA
ZIP code 51044	8.6 mi	Oto, IA
ZIP code 51048	10 mi	Pierson, IA
ZIP code 51015	10 mi	Climbing Hill, IA
ZIP code 51056	11 mi	Smithland, IA
ZIP code 51039	11 mi	Moville, IA
ZIP code 51026	12 mi	Hornick, IA
ZIP code 51019	12 mi	Danbury, 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 51004, plotted from its record coordinates.

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

Scope ZIP code 51004. 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.