ZIP Code 51247

51247 is one of Iowa's ZIP codes, delivering to addresses in Rock Valley, Sioux County.

City: Rock Valley
County: Sioux County
State: Iowa
Prefix: 512xx

Where this code sits

51247 is part of the 512xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rock Valley.

Rock Valley Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51247 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51247

The ZIP codes whose reference points sit closest to 51247.
ZIP code	Distance	Delivers to
ZIP code 51235	8.1 mi	Doon, IA
ZIP code 51230	8.3 mi	Alvord, IA
ZIP code 51239	8.6 mi	Hull, IA
ZIP code 51240	9.5 mi	Inwood, IA
ZIP code 57027	10 mi	Fairview, SD
ZIP code 51250	11 mi	Sioux Center, IA
ZIP code 57034	12 mi	Hudson, SD
ZIP code 57013	16 mi	Canton, SD

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 51247, plotted from its record coordinates.

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

Scope ZIP code 51247. 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.