Ottosen Iowa ZIP Codes

Ottosen holds a single ZIP code.

Every ZIP code in Ottosen

The complete list of Ottosen, Iowa ZIP codes with the county each falls in.
ZIP code	County
50570	Humboldt 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Ottosen codes above are listed without a column we would have to invent.

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

Every Iowa ZIP prefix and the region it covers →

Area codes covering Ottosen

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 Ottosen occupies.

515 Area code 515

Ottosen Iowa area codes in full →

Where Ottosen's ZIP codes sit

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

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

Cities near Ottosen

The closest places to Ottosen with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Bode Iowa ZIP codes	5.0 mi	1 ZIP code
West Bend Iowa ZIP codes	5.6 mi	1 ZIP code
Bradgate Iowa ZIP codes	6.9 mi	1 ZIP code
Rolfe Iowa ZIP codes	9.8 mi	1 ZIP code
Livermore Iowa ZIP codes	9.9 mi	1 ZIP code
Rutland Iowa ZIP codes	10 mi	1 ZIP code
Whittemore Iowa ZIP codes	12 mi	1 ZIP code
Gilmore City Iowa ZIP codes	12 mi	1 ZIP code

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