ZIP Code 94583
94583 is one of California's ZIP codes, delivering to addresses in San Ramon, Contra Costa County.
- City
- San Ramon
- County
- Contra Costa County
- State
- California
- Prefix
- 945xx
Where this code sits
94583 is part of the 945xx range, the group of codes handled by one mail processing centre. San Ramon is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the San Ramon page.
San Ramon California ZIP codes →
Area codes over the same ground
Postal and telephone geography are drawn separately, so these codes cover the area 94583 delivers to without sharing its boundary.
ZIP codes nearest 94583
| ZIP code | Distance | Delivers to |
|---|---|---|
| ZIP code 94570 | 1.5 mi | Moraga, CA |
| ZIP code 94575 | 1.5 mi | Moraga, CA |
| ZIP code 94582 | 2.1 mi | San Ramon, CA |
| ZIP code 94568 | 3.2 mi | Dublin, CA |
| ZIP code 94526 | 4.1 mi | Danville, CA |
| ZIP code 94537 | 5.5 mi | Fremont, CA |
| ZIP code 94540 | 5.5 mi | Hayward, CA |
| ZIP code 94557 | 5.5 mi | Hayward, CA |
Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope ZIP code 94583. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.