Fostoria Iowa ZIP Codes
Fostoria holds a single ZIP code.
Every ZIP code in Fostoria
| ZIP code | County |
|---|---|
| 51340 | Clay 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Fostoria codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Fostoria. 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 Fostoria ZIP code begins 513. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 23 ZIP codes, so Fostoria accounts for 4% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Fostoria
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 Fostoria occupies.
These codes are associated with Fostoria through county-level matching, not a per-address guarantee.
Fostoria Iowa area codes in full →
Where Fostoria's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Fostoria
| City | Distance | ZIP codes |
|---|---|---|
| Spencer Iowa ZIP codes | 6.6 mi | 1 ZIP code |
| Milford Iowa ZIP codes | 6.8 mi | 1 ZIP code |
| Arnolds Park Iowa ZIP codes | 8.2 mi | 1 ZIP code |
| Everly Iowa ZIP codes | 9.8 mi | 1 ZIP code |
| Dickens Iowa ZIP codes | 10 mi | 1 ZIP code |
| Okoboji Iowa ZIP codes | 10 mi | 1 ZIP code |
| Terril Iowa ZIP codes | 10 mi | 1 ZIP code |
| Spirit Lake Iowa ZIP codes | 12 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.