Isleton California ZIP Codes

Isleton holds a single ZIP code.

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Isleton codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Isleton. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

Every Isleton ZIP code begins 956. Those first three digits identify the sectional center facility that processes mail for this part of California. Statewide that range covers 94 ZIP codes, so Isleton accounts for 1% of it.

Every California ZIP prefix and the region it covers →

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 Isleton occupies.

• 279 Area code 279
• 916 Area code 916

Isleton California area codes in full →

Straight-line distance between place reference points, not driving distance.