To allow employees time to enjoy the holiday season, the Mason County Board of County Commissioners has authorized the following 2014 Holiday Schedule:
The Board of County Commissioners meeting on December 23, 2014 will be
at 9:00 AM rather than 6:00 PM.

All County Offices have been authorized to closed at 3:00 PM on Wednesday, December 24, 2014 and December 31, 2014 - The switchboard will also close at 3:00 PM on those dates with a revised message directing people to the court offices. Offices that are mandated by Washington State Law (Courts) will remain open until 4:30 PM on those days.

All County Offices will be open for business during regular hours on
Friday, December 26, 2014 and January 2, 2015.  
2014 Tax Foreclosure Sale date is January 9th, 2015  
Mason County Washington - Government Information
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GIS Home



Parcel Map Viewer

Assessor / Treasurer Parcel Search

Site Requirements


Contact GIS
GIS Data Download

Geographic Information Systems – GIS Data Download

The Mason County GIS Department provides free download of their standard GIS data sets in shapefile format.  Use the links below to access the download pages for the layers you need.  If you need a data set that is not listed here, contact the GIS Department to see if it is available.  Please note that the GIS Department only distributes data that it maintains.  Many other GIS datasets that cover Mason County are available from various state agencies.  We have provided links to the most common agency GIS data webpages on our “Links” page under the “Washington State GIS Data” section.


GIS DATA Links (the list of layers)

Addressing Districts

Allyn Urban Growth Area Zoning

Belfair Urban Growth Area Zoning

Cemetery District

Common Places (Points of Interest)

Contours 100 foot

Contours 20 foot

Contours 10 foot

County Boundary

County Bridges

County Commissioner Districts

County Zoning (Development Areas)

Election Precincts

Fire Districts

Hospital Districts


Physical Appraisal Areas

Port Districts (with Port Commissioner Districts)

Public Utility Districts (with PUD Commissioner Districts)


Sanderson Airfield

School Districts


Shelton City Limits Boundary

Shelton Urban Growth Area Zoning

Site Addresses

Street Centerlines


Urban Growth Area, Rural Activity Center and Hamlet Boundaries

Zip Codes