San Dimas California ZIP Codes
San Dimas holds a single ZIP code.
Every ZIP code in San Dimas
| ZIP code | County |
|---|---|
| 91773 | Los Angeles 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 San Dimas codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for San Dimas. 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 San Dimas ZIP code begins 917. Those first three digits identify the sectional center facility that processes mail for this part of California. Statewide that range covers 64 ZIP codes, so San Dimas accounts for 2% of it.
Every California ZIP prefix and the region it covers →
Area codes covering San Dimas
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 Dimas occupies.
San Dimas California area codes in full →
Where San Dimas's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near San Dimas
| City | Distance | ZIP codes |
|---|---|---|
| La Verne California ZIP codes | 2.4 mi | 1 ZIP code |
| Glendora California ZIP codes | 3.4 mi | 2 ZIP codes |
| Pomona California ZIP codes | 4.4 mi | 4 ZIP codes |
| Covina California ZIP codes | 4.4 mi | 3 ZIP codes |
| Claremont California ZIP codes | 5.5 mi | 1 ZIP code |
| Walnut California ZIP codes | 5.6 mi | 2 ZIP codes |
| Azusa California ZIP codes | 6.3 mi | 1 ZIP code |
| Montclair California ZIP codes | 6.8 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.