Oto Iowa ZIP Codes
Oto holds a single ZIP code.
Every ZIP code in Oto
| ZIP code | County |
|---|---|
| 51044 | Woodbury 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Oto codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Oto. 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 Oto 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 Oto accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Oto
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 Oto occupies.
Where Oto's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Oto
| City | Distance | ZIP codes |
|---|---|---|
| Smithland Iowa ZIP codes | 4.1 mi | 1 ZIP code |
| Rodney Iowa ZIP codes | 6.1 mi | 1 ZIP code |
| Anthon Iowa ZIP codes | 7.5 mi | 1 ZIP code |
| Danbury Iowa ZIP codes | 9.4 mi | 1 ZIP code |
| Mapleton Iowa ZIP codes | 9.5 mi | 1 ZIP code |
| Hornick Iowa ZIP codes | 11 mi | 1 ZIP code |
| Castana Iowa ZIP codes | 15 mi | 1 ZIP code |
| Correctionville Iowa ZIP codes | 15 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.