Post Offices in Mason County, Washington

There are 9 Post Offices in Mason County, Washington, serving a population of 61,569 people in an area of 960 square miles. There is 1 Post Office per 6,841 people, and 1 Post Office per 106 square miles.

In Washington, Mason County is ranked 20th of 39 counties in Post Offices per capita, and 13th of 39 counties in Post Offices per square mile.

List of Mason County Post Offices

Find Mason County, Washington post offices and USPS mailing boxes.


Allyn Post Office 18329 Route 3 Allyn, WA

Belfair Post Office 60 Northeast Ridge Point Boulevard Belfair, WA

Grapeview Post Office 4290 East Grapeview Loop Road Grapeview, WA

Hoodsport Post Office 76 North Lake Cushman Road Hoodsport, WA

Lilliwaup Post Office 28611 U.s. 101 Lilliwaup, WA

Matlock Post Office 17490 West Shelton Matlock Road Matlock, WA

Shelton Post Office 218 Mark E Reed Way Shelton, WA

Tahuya Post Office 14850 Northeast North Shore Road Tahuya, WA

Union Post Office 310 East Dalby Road Union, WA

About Mason County Post Offices

Mason County Post Offices are branch locations of the customer service postal facilities of the United States Postal Service (USPS) in Mason County, WA. The USPS is an independent agency of the federal government that provides mail and package delivery services to all states and territories. Mason County post offices are supported entirely by revenues generated by their own operations. Operational authority over the USPS lies with a Board of Governors and rate setting authority falls under the Postal Rate Commission.

You may contact the Post Office for questions about:
  • Mason County Post Office hours and locations
  • Mail and package delivery services
  • Mason County PO Box services
  • Passport applications and renewals
  • Mason County Post Office jobs and employment