ZIP Code 94963

94963 is one of California's ZIP codes, delivering to addresses in San Geronimo, Marin County.

City: San Geronimo
County: Marin County
State: California
Prefix: 949xx

Where this code sits

94963 is part of the 949xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to San Geronimo.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94963 delivers to without sharing its boundary.

ZIP codes nearest 94963

The ZIP codes whose reference points sit closest to 94963.
ZIP code	Distance	Delivers to
ZIP code 94933	1.5 mi	Forest Knolls, CA
ZIP code 94973	1.5 mi	Woodacre, CA
ZIP code 94938	2.1 mi	Lagunitas, CA
ZIP code 94946	3.4 mi	Nicasio, CA
ZIP code 94930	4.2 mi	Fairfax, CA
ZIP code 94978	4.5 mi	Fairfax, CA
ZIP code 94903	4.5 mi	San Rafael, CA
ZIP code 94960	5.4 mi	San Anselmo, 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 94963, plotted from its record coordinates.

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

Scope ZIP code 94963. 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.