ZIP Code 94517

94517 is one of California's ZIP codes, delivering to addresses in Clayton, Contra Costa County.

City: Clayton
County: Contra Costa County
State: California
Prefix: 945xx

Where this code sits

94517 is part of the 945xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Clayton.

Clayton California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94517 delivers to without sharing its boundary.

925 Area code 925

ZIP codes nearest 94517

The ZIP codes whose reference points sit closest to 94517.
ZIP code	Distance	Delivers to
ZIP code 94527	3.7 mi	Concord, CA
ZIP code 94521	4.6 mi	Concord, CA
ZIP code 94506	5.8 mi	Danville, CA
ZIP code 94565	6.1 mi	Pittsburg, CA
ZIP code 94528	6.1 mi	Diablo, CA
ZIP code 94598	6.3 mi	Walnut Creek, CA
ZIP code 94518	6.8 mi	Concord, CA
ZIP code 94519	7.3 mi	Concord, 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.

Each point is the reference point for 94517, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 94517. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.