ZIP Code 94820

94820 is one of California's ZIP codes, delivering to addresses in El Sobrante, Contra Costa County.

City: El Sobrante
County: Contra Costa County
State: California
Prefix: 948xx

Where this code sits

94820 is part of the 948xx range, the group of codes handled by one mail processing centre. El Sobrante is served by 2 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94820 delivers to without sharing its boundary.

ZIP codes nearest 94820

The ZIP codes whose reference points sit closest to 94820.
ZIP code	Distance	Delivers to
ZIP code 94803	0.6 mi	El Sobrante, CA
ZIP code 94564	1.4 mi	Pinole, CA
ZIP code 94806	2.3 mi	San Pablo, CA
ZIP code 94547	2.7 mi	Hercules, CA
ZIP code 94805	2.9 mi	Richmond, CA
ZIP code 94802	4.0 mi	Richmond, CA
ZIP code 94807	4.0 mi	Richmond, CA
ZIP code 94808	4.0 mi	Richmond, 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 94820, plotted from its record coordinates.

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

Scope ZIP code 94820. 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.