Oakley California ZIP Codes
Oakley holds a single ZIP code.
Every ZIP code in Oakley
| ZIP code | County |
|---|---|
| 94561 | Contra Costa 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Oakley codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Oakley. 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 Oakley ZIP code begins 945. Those first three digits identify the sectional center facility that processes mail for this part of California. Statewide that range covers 93 ZIP codes, so Oakley accounts for 1% of it.
Every California ZIP prefix and the region it covers →
Area codes covering Oakley
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Oakley occupies.
Oakley California area codes in full →
Where Oakley's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Oakley
| City | Distance | ZIP codes |
|---|---|---|
| Brentwood California ZIP codes | 4.4 mi | 1 ZIP code |
| Antioch California ZIP codes | 5.7 mi | 2 ZIP codes |
| Pittsburg California ZIP codes | 11 mi | 1 ZIP code |
| Isleton California ZIP codes | 12 mi | 1 ZIP code |
| Rio Vista California ZIP codes | 13 mi | 1 ZIP code |
| Clayton California ZIP codes | 13 mi | 1 ZIP code |
| Concord California ZIP codes | 17 mi | 8 ZIP codes |
| Danville California ZIP codes | 20 mi | 2 ZIP codes |
Straight-line distance between place reference points, not driving distance.