United States Postal Service 33170 Alvarado Niles Rd, Union City, CA94587 Located on Alvarado-Niles Road, this United States Postal Service office provides full postal services as well as…More passport application services. It has automated postal centers and P.O boxes for rent.
United States Postal Service 3861 Smith St, Union City, CA94587 This is a small branch of the USPS and as such has a limited number of services. It has a number of P.O. boxes…More available, and you can ship anything within its guidelines at the counter.