Caldwell Idaho ZIP Codes
Caldwell holds 3 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Caldwell
| ZIP code | County |
|---|---|
| 83605 | Canyon County |
| 83606 | Canyon County |
| 83607 | Canyon 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Caldwell codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Caldwell. 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 Caldwell ZIP code begins 836. Those first three digits identify the sectional center facility that processes mail for this part of Idaho. Statewide that range covers 58 ZIP codes, so Caldwell accounts for 5% of it.
Every Idaho ZIP prefix and the region it covers →
Area codes covering Caldwell
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 Caldwell occupies.
Caldwell Idaho area codes in full →
Where Caldwell's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Caldwell
| City | Distance | ZIP codes |
|---|---|---|
| Middleton Idaho ZIP codes | 5.0 mi | 1 ZIP code |
| Nampa Idaho ZIP codes | 6.4 mi | 5 ZIP codes |
| Greenleaf Idaho ZIP codes | 8.3 mi | 1 ZIP code |
| Notus Idaho ZIP codes | 9.0 mi | 1 ZIP code |
| Star Idaho ZIP codes | 9.5 mi | 1 ZIP code |
| Marsing Idaho ZIP codes | 10 mi | 1 ZIP code |
| Wilder Idaho ZIP codes | 13 mi | 1 ZIP code |
| Meridian Idaho ZIP codes | 13 mi | 3 ZIP codes |
Straight-line distance between place reference points, not driving distance.