205 W 5th Ave
Ellensburg, WA 98926-2887
Monday - Friday
8 AM - 5 PM
Kittitas (pronounced 'KITT-i-tass') County is located in central Washington
State. It spans from the lush forested Cascade Mountains to the upper Yakima River Valley plains and
the Columbia River.
If the name change is being requested due to a marriage, divorce, or death, the process will be handled
by the Kittitas County Assessor's Office.
If this name change is a transfer of property ownership due to a sale or change in identify, the process
will be handled by the Kittitas County Treasurer's Office. In
order for the ownership transfer to be processed, you will need to file a Real Estate Excise Tax Affidavit
at the Treasurer's Office. If the transaction is a sale, real estate excise tax in the amount of 1.53%
of the gross selling price is due on the transfer. The Real Estate
Tax Affidavit is available for download on the Treasurer's website, or you can contact us at
(509) 962-7535, and we will forward a copy of the document to you.
NOTE: Each person owning property in Kittitas County is assigned an Owner ID which allows us
to accurately send tax information on all properties owned, as well as helping us to provide a high
level of customer service when questions arise. If the owner name appears differently on separate properties,
we cannot know that they are associated. For example: John Smith, John A Smith and John & Ellen Smith
will all be given different owner ID’s, even if the mailing address is the same. If you own multiple
properties and you want your name to appear the same on all properties you own please verify your owner
name information when submitting an Owner Name Change request. If you would like to combine all of your
properties under one Owner ID, please contact the Kittitas County Assessor's
If you need to change your mailing address, use the Mailing
Address Change Request Form.
Kittitas County has a total area of 2,333 square miles. The highest point in the county is Mount Daniel at 7,959 feet above sea level.