ZIP Code 94931

94931 is one of California's ZIP codes, delivering to addresses in Cotati, Sonoma County.

City: Cotati
County: Sonoma County
State: California
Prefix: 949xx

Where this code sits

94931 is part of the 949xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Cotati.

Cotati California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 94931 delivers to without sharing its boundary.

ZIP codes nearest 94931

The ZIP codes whose reference points sit closest to 94931.
ZIP code	Distance	Delivers to
ZIP code 94926	1.0 mi	Rohnert Park, CA
ZIP code 94927	1.0 mi	Rohnert Park, CA
ZIP code 94928	1.6 mi	Rohnert Park, CA
ZIP code 94951	3.1 mi	Penngrove, CA
ZIP code 94999	4.8 mi	Petaluma, CA
ZIP code 95407	5.9 mi	Santa Rosa, CA
ZIP code 94952	6.1 mi	Petaluma, CA
ZIP code 94954	7.1 mi	Petaluma, 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 94931, plotted from its record coordinates.

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

Scope ZIP code 94931. 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.