Thornton Iowa ZIP Codes
Thornton holds a single ZIP code.
Every ZIP code in Thornton
| ZIP code | County |
|---|---|
| 50479 | Cerro Gordo 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Thornton codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Thornton. 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 Thornton ZIP code begins 504. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 57 ZIP codes, so Thornton accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Thornton
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 Thornton occupies.
Thornton Iowa area codes in full →
Where Thornton's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Thornton
| City | Distance | ZIP codes |
|---|---|---|
| Swaledale Iowa ZIP codes | 4.2 mi | 1 ZIP code |
| Meservey Iowa ZIP codes | 4.8 mi | 1 ZIP code |
| Sheffield Iowa ZIP codes | 9.9 mi | 1 ZIP code |
| Alexander Iowa ZIP codes | 11 mi | 1 ZIP code |
| Goodell Iowa ZIP codes | 12 mi | 1 ZIP code |
| Klemme Iowa ZIP codes | 12 mi | 1 ZIP code |
| Latimer Iowa ZIP codes | 13 mi | 1 ZIP code |
| Belmond Iowa ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.