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Smithland Iowa ZIP Codes

Smithland holds a single ZIP code.

Every ZIP code in Smithland

The complete list of Smithland, Iowa ZIP codes with the county each falls in.
ZIP codeCounty
51056Woodbury 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Smithland codes above are listed without a column we would have to invent.

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

How these codes cluster

Every Smithland ZIP code begins 510. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 55 ZIP codes, so Smithland accounts for 2% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Smithland

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 Smithland occupies.

Smithland Iowa area codes in full →

Where Smithland's ZIP codes sit

Each point is one Smithland ZIP code, plotted from its record coordinates.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Cities near Smithland

The closest places to Smithland with their own ZIP code list, nearest first.
CityDistanceZIP codes
Rodney Iowa ZIP codes2.0 mi1 ZIP code
Oto Iowa ZIP codes4.1 mi1 ZIP code
Mapleton Iowa ZIP codes8.4 mi1 ZIP code
Hornick Iowa ZIP codes8.4 mi1 ZIP code
Danbury Iowa ZIP codes11 mi1 ZIP code
Castana Iowa ZIP codes11 mi1 ZIP code
Anthon Iowa ZIP codes12 mi1 ZIP code
Whiting Iowa ZIP codes13 mi1 ZIP code

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