Post office · Union City, CA

USPS

3861 SMITH STREET

Union City, CA 94587

Address

3861 Smith Street, Union City, CA 94587

Opening hours

Monday – Friday	9:30 AM–1 PM, 2 PM–4:30 PM
Saturday – Sunday	Closed

Hours may differ on public holidays.

Coordinates

37.596601, -122.077938

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 USPS?

USPS is located at 3861 Smith Street, Union City, CA 94587. Use “Get directions” to start a route from where you are.

What are the opening hours of USPS?

Recorded opening hours: Monday – Friday 9:30 AM–1 PM, 2 PM–4:30 PM; Saturday – Sunday Closed. Hours may differ on holidays.