Barnum Iowa ZIP Codes

Barnum holds a single ZIP code.

Every ZIP code in Barnum

The complete list of Barnum, Iowa ZIP codes with the county each falls in.
ZIP code	County
50518	Webster 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Barnum codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Barnum. 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 Barnum ZIP code begins 505. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 75 ZIP codes, so Barnum accounts for 1% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Barnum

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

Barnum Iowa area codes in full →

Where Barnum's ZIP codes sit

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

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

Cities near Barnum

The closest places to Barnum with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Clare Iowa ZIP codes	5.7 mi	1 ZIP code
Moorland Iowa ZIP codes	5.7 mi	1 ZIP code
Knierim Iowa ZIP codes	5.7 mi	1 ZIP code
Manson Iowa ZIP codes	9.0 mi	1 ZIP code
Somers Iowa ZIP codes	9.4 mi	1 ZIP code
Fort Dodge Iowa ZIP codes	9.7 mi	1 ZIP code
Callender Iowa ZIP codes	11 mi	1 ZIP code
Otho Iowa ZIP codes	13 mi	1 ZIP code

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