Castleford Idaho ZIP Codes
Castleford holds a single ZIP code.
Every ZIP code in Castleford
| ZIP code | County |
|---|---|
| 83321 | Twin Falls 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Castleford codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Castleford. 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 Castleford ZIP code begins 833. Those first three digits identify the sectional center facility that processes mail for this part of Idaho. Statewide that range covers 39 ZIP codes, so Castleford accounts for 3% of it.
Every Idaho ZIP prefix and the region it covers →
Area codes covering Castleford
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Castleford occupies.
Castleford Idaho area codes in full →
Where Castleford's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Castleford
| City | Distance | ZIP codes |
|---|---|---|
| Buhl Idaho ZIP codes | 7.8 mi | 1 ZIP code |
| Filer Idaho ZIP codes | 14 mi | 1 ZIP code |
| Wendell Idaho ZIP codes | 20 mi | 1 ZIP code |
| Hagerman Idaho ZIP codes | 21 mi | 1 ZIP code |
| Twin Falls Idaho ZIP codes | 21 mi | 2 ZIP codes |
| Jerome Idaho ZIP codes | 23 mi | 1 ZIP code |
| Kimberly Idaho ZIP codes | 26 mi | 1 ZIP code |
| Bliss Idaho ZIP codes | 28 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.