North Washington Iowa ZIP Codes

North Washington holds a single ZIP code.

Every ZIP code in North Washington

The complete list of North Washington, Iowa ZIP codes with the county each falls in.
ZIP code	County
50661	Chickasaw 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 North Washington codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for North Washington. 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 North Washington ZIP code begins 506. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 70 ZIP codes, so North Washington accounts for 1% of it.

Every Iowa ZIP prefix and the region it covers →

Area codes covering North Washington

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 North Washington occupies.

641 Area code 641

These codes are associated with North Washington through county-level matching, not a per-address guarantee.

North Washington Iowa area codes in full →

Where North Washington's ZIP codes sit

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

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

Cities near North Washington

The closest places to North Washington with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Alta Vista Iowa ZIP codes	5.5 mi	1 ZIP code
Ionia Iowa ZIP codes	6.0 mi	1 ZIP code
New Hampton Iowa ZIP codes	6.6 mi	1 ZIP code
Elma Iowa ZIP codes	9.0 mi	1 ZIP code
Colwell Iowa ZIP codes	9.3 mi	1 ZIP code
Nashua Iowa ZIP codes	13 mi	1 ZIP code
Charles City Iowa ZIP codes	14 mi	1 ZIP code
Lawler Iowa ZIP codes	14 mi	1 ZIP code

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