ZIP Code 94520

94520 is one of California's ZIP codes, delivering to addresses in Concord, Contra Costa County.

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

Where this code sits

94520 is part of the 945xx range, the group of codes handled by one mail processing centre. Concord is served by 8 ZIP codes in total; the full list, with the county each falls in, is on the Concord page.

Concord California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94520 delivers to without sharing its boundary.

925 Area code 925

ZIP codes nearest 94520

The ZIP codes whose reference points sit closest to 94520.
ZIP code	Distance	Delivers to
ZIP code 94522	0.4 mi	Concord, CA
ZIP code 94524	0.4 mi	Concord, CA
ZIP code 94529	0.4 mi	Concord, CA
ZIP code 94519	1.3 mi	Concord, CA
ZIP code 94518	2.3 mi	Concord, CA
ZIP code 94523	2.8 mi	Pleasant Hill, CA
ZIP code 94521	3.7 mi	Concord, CA
ZIP code 94598	4.4 mi	Walnut Creek, 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 94520, plotted from its record coordinates.

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

Scope ZIP code 94520. 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.