Union City Main Post Office

Post office

33170 Alvarado Niles Road, Union City, CA 94587

Effective Nov. 1, 2016 passport photos of passport applicants wearing eye glasses will not be accepted.

Hours and addresses come from the State Department listing, updated November 2, 2026.

Book at USPS Directions Facilities in Union City Facilities in California

Union City Main Post Office accepts new U.S. passport applications in person in Union City, CA. First-time and child visits are booked on the USPS scheduler. Search ZIP 94587. How to apply · How to renew