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Post Offices in Mattawa

Click on the Post Office from this list of 1 Post Offices in Mattawa to view the opening hours, phone number, drop-off times, services and other information.

1. USPS Post Office Cpu Mattawa

111 Government Rd

Mattawa, WA 99349

The Post Office is open Monday to Friday from 9:30 am to 5:30 pm. It is closed Saturday and Sunday.