ZIP Code 94070

94070 is one of California's ZIP codes, delivering to addresses in San Carlos, San Mateo County.

City: San Carlos
County: San Mateo County
State: California
Prefix: 940xx

Where this code sits

94070 is part of the 940xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to San Carlos.

San Carlos California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94070 delivers to without sharing its boundary.

ZIP codes nearest 94070

The ZIP codes whose reference points sit closest to 94070.
ZIP code	Distance	Delivers to
ZIP code 94002	2.0 mi	Belmont, CA
ZIP code 94065	2.7 mi	Redwood City, CA
ZIP code 94061	3.0 mi	Redwood City, CA
ZIP code 94063	3.4 mi	Redwood City, CA
ZIP code 94403	3.4 mi	San Mateo, CA
ZIP code 94404	3.9 mi	San Mateo, CA
ZIP code 94497	4.1 mi	San Mateo, CA
ZIP code 94027	4.6 mi	Atherton, 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 94070, plotted from its record coordinates.

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

Scope ZIP code 94070. 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.