Denison Iowa ZIP Codes

Denison holds a single ZIP code.

Every ZIP code in Denison

The complete list of Denison, Iowa ZIP codes with the county each falls in.
ZIP code	County
51442	Crawford County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Denison codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Denison. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Denison ZIP code begins 514. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 32 ZIP codes, so Denison accounts for 3% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Denison

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Denison occupies.

712 Area code 712

Denison Iowa area codes in full →

Where Denison's ZIP codes sit

Each point is one Denison ZIP code, plotted from its record coordinates.

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

Cities near Denison

The closest places to Denison with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Deloit Iowa ZIP codes	5.9 mi	1 ZIP code
Arion Iowa ZIP codes	7.4 mi	1 ZIP code
Vail Iowa ZIP codes	8.4 mi	1 ZIP code
Dow City Iowa ZIP codes	9.5 mi	1 ZIP code
Manilla Iowa ZIP codes	11 mi	1 ZIP code
Schleswig Iowa ZIP codes	11 mi	1 ZIP code
Kiron Iowa ZIP codes	12 mi	1 ZIP code
Charter Oak Iowa ZIP codes	13 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.