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Armstrong Iowa ZIP Codes

Armstrong holds a single ZIP code.

Every ZIP code in Armstrong

The complete list of Armstrong, Iowa ZIP codes with the county each falls in.
ZIP codeCounty
50514Emmet 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Armstrong codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Armstrong. 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 Armstrong 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 Armstrong accounts for 1% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering Armstrong

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 Armstrong occupies.

Armstrong Iowa area codes in full →

Where Armstrong's ZIP codes sit

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

Cities near Armstrong

The closest places to Armstrong with their own ZIP code list, nearest first.
CityDistanceZIP codes
Ringsted Iowa ZIP codes7.0 mi1 ZIP code
Dolliver Iowa ZIP codes8.1 mi1 ZIP code
Swea City Iowa ZIP codes8.7 mi1 ZIP code
Fenton Iowa ZIP codes13 mi1 ZIP code
Lone Rock Iowa ZIP codes14 mi1 ZIP code
Bancroft Iowa ZIP codes15 mi1 ZIP code
Wallingford Iowa ZIP codes16 mi1 ZIP code
Ledyard Iowa ZIP codes16 mi1 ZIP code

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