Washington Property Tax Assessors

Island County, Washington Tax Assessors' Office

Island County Assessors Phone Number
Island County Assessor
1 NW 7th Street, Suite 208
Coupeville, Washington 98239
Island County Assessors Fax Number 360-240-5565 (Fax)

Where is the Island County Tax Assessor's Office?

The Island County Tax Assessor Office is located at 1 NW 7th Street, Suite 208 in Coupeville, Washington.

What can the Island County Assessor's Office do for me?

The Island County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in Island County.

Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.

Submitting a Island County property tax appeal

If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.

You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.

If you would like to appeal your property, call the Island County Assessor's Office at (360) 679 7303 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.

For more information and example appeals, see how to appeal your property taxes.

Useful Island County Facts:

The median home value in Island County is between $298,330.00 and $315,870.00. Property tax rates are based on property values.

How can I contact Island County?

You can try contacting the Island County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.

The county seat for Island County is located in the County Courthouse in Coupeville, which is located at PO BOX 5000. You can direct your general inquiries to Island County with the contact info listed below.

Island County Phone Number


Island County Fax Number


Island County County Courthouse Address

County Courthouse
PO BOX 5000
Coupeville, WA 98239-5000

Useful Island County Links:

Links broken? Please contact us if any of our Island County links are not working or are out-of-date.