ZIP Code 94940

94940 is one of California's ZIP codes, delivering to addresses in Marshall, Marin County.

City: Marshall
County: Marin County
State: California
Prefix: 949xx

Where this code sits

94940 is part of the 949xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Marshall.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94940 delivers to without sharing its boundary.

ZIP codes nearest 94940

The ZIP codes whose reference points sit closest to 94940.
ZIP code	Distance	Delivers to
ZIP code 94937	4.4 mi	Inverness, CA
ZIP code 94971	4.8 mi	Tomales, CA
ZIP code 94929	6.6 mi	Dillon Beach, CA
ZIP code 94956	8.7 mi	Point Reyes Station, CA
ZIP code 94972	10 mi	Valley Ford, CA
ZIP code 94950	11 mi	Olema, CA
ZIP code 94952	12 mi	Petaluma, CA
ZIP code 94922	13 mi	Bodega, 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 94940, plotted from its record coordinates.

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

Scope ZIP code 94940. 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.