Post office · Marin County, CA

Forest Knolls Post Office

6 CASTRO AVENUE

Marin County, CA 94933

Address

6 Castro Avenue, Forest Knolls, CA 94933

Opening hours

Monday – Saturday	8 AM–4 PM
Sunday	Closed

Hours may differ on public holidays.

Coordinates

38.015135, -122.689642

This listing is based on OpenStreetMap data (updated 2026-10-06). Something wrong? Fix it on OpenStreetMap or let us know.

Frequently asked questions

Where is Forest Knolls Post Office?

Forest Knolls Post Office is located at 6 Castro Avenue, Forest Knolls, CA 94933. Use “Get directions” to start a route from where you are.

What are the opening hours of Forest Knolls Post Office?

Recorded opening hours: Monday – Saturday 8 AM–4 PM; Sunday Closed. Hours may differ on holidays.