ZIP Code 51442

51442 is one of Iowa's ZIP codes, delivering to addresses in Denison, Crawford County.

City: Denison
County: Crawford County
State: Iowa
Prefix: 514xx

Where this code sits

51442 is part of the 514xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Denison.

Denison Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 51442 delivers to without sharing its boundary.

712 Area code 712

ZIP codes nearest 51442

The ZIP codes whose reference points sit closest to 51442.
ZIP code	Distance	Delivers to
ZIP code 51520	7.0 mi	Arion, IA
ZIP code 51441	7.8 mi	Deloit, IA
ZIP code 51465	9.6 mi	Vail, IA
ZIP code 51528	9.7 mi	Dow City, IA
ZIP code 51461	11 mi	Schleswig, IA
ZIP code 51454	11 mi	Manilla, IA
ZIP code 51448	11 mi	Kiron, IA
ZIP code 51439	13 mi	Charter Oak, 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 51442, plotted from its record coordinates.

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

Scope ZIP code 51442. 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.