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  
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GIS Home



Parcel Map Viewer

Assessor / Treasurer Parcel Search

Site Requirements


Contact GIS
GIS Data Download

Geographic Information Systems - GIS

The Geographic Information Systems (GIS) Department resides within the Public Works department of Mason County. The GIS Department creates and maintains geographic data for the support of Mason County Public Works, other county departments, and the public. The GIS Department is committed to providing excellence in GIS services such as base map development, spatial data analysis, and map creation services.

Parcel Map Viewer


Welcome to the Parcel Map Viewer! This site will allow you to interactively explore maps and information about Mason County. You can search for a parcel, turn map layers on and off, measure, zoom in and out, find information about features on the map, and print.

If you have questions about how to use the site, please Click Here to view the Help page. You can also get to the help page by clicking the link on the top of the Parcel Map Viewer page.

We are continuously working to improve the site, so check back often for updates!


The Parcel Map Viewer is a way to deliver dynamic maps and data via the Web. Information about the county is displayed in the form of maps, tables, and text, and allows customers to search for a property using a parcel number, a street address, or by simply clicking on the displayed map. Mason County has created this interactive mapping tool in the interest of sharing information with the public in a convenient and easily accessible manner.

Map Viewers
Mason County Washington GIS Map Viewer
This is the main map, with parcels, zoning, election precincts, and related features.
Parcel Map Viewer

This viewer contains information relevant to the Shoreline Master Program (SMP) update process

SMP Map Viewer  
Parcel Map and Data Corrections
Have you noticed an error with our parcels and or mapping services?
Please let us know Click Here
Please Click Here to read our help and how-to section.
Frequently Asked Questions (FAQs)
Please Click Here to read our Frequently Asked Questions.
Please Note - Site Requirements

Our interactive mapping site uses popup windows. If you use a popup blocker, you will need to disable it for this site. In addition this site may use cookies.

This site is best viewed with a high-speed internet connection and with Internet Explorer 6.0. Other web browsers have not been tested and are not supported. Further, your screen resolution should be set to at least 800 x 600.

Please Click Here for more site requirements.

Be advised that the Parcel Map Viewer is intended to serve only as a general reference guide, and that the data provided have limited accuracy. It should not be used as a substitute for specific advise from a licensed professional, and you should not act (or refrain from acting) based upon data viewed in the Parcel Map Viewer.

Please Click Here to view the full Disclaimer, Conditions and Terms of Use.