ZIP Code 94083

94083 is one of California's ZIP codes, delivering to addresses in South San Francisco, San Mateo County.

City

South San Francisco

County

San Mateo County

State

California

Prefix

940xx

Where this code sits

94083 is part of the 940xx range, the group of codes handled by one mail processing centre. South San Francisco is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the South San Francisco page.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94083 delivers to without sharing its boundary.

ZIP codes nearest 94083

The ZIP codes whose reference points sit closest to 94083.
ZIP code	Distance	Delivers to
ZIP code 94080	0.9 mi	South San Francisco, CA
ZIP code 94005	1.9 mi	Brisbane, CA
ZIP code 94066	2.4 mi	San Bruno, CA
ZIP code 94128	2.4 mi	San Francisco, CA
ZIP code 94014	2.8 mi	Daly City, CA
ZIP code 94030	3.8 mi	Millbrae, CA
ZIP code 94015	4.2 mi	Daly City, CA
ZIP code 94134	4.4 mi	San Francisco, 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 94083, plotted from its record coordinates.

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

Scope ZIP code 94083. 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.