San Diego California ZIP Codes

San Diego holds 76 ZIP codes, all inside one county and one postal prefix.

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Scope every ZIP code recorded for San Diego. 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 San Diego ZIP code begins 921. Those first three digits identify the sectional center facility that processes mail for this part of California. Statewide that range covers 80 ZIP codes, so San Diego accounts for 95% 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 San Diego occupies.

• 442 Area code 442
• 619 Area code 619
• 760 Area code 760
• 858 Area code 858

San Diego California area codes in full →

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