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Island County > Treasurer > Paying Your Taxes



Return your tax payment coupon(s) along with your check made payable to the Island County Treasurer. We cannot accept post-dated checks, cash, or credit numbers through the mail. Please be sure that the postmark on your envelope is on or before the due date to avoid incurring interest and/or penalty. If you want a receipt, you must enclose a self-addressed, stamped envelope or request one be emailed to you. Please mail to the following address:

Island County Treasurer

PO Box 699

Coupeville, WA 98239-0699


Stop by the Treasurer's office between 9:00 a.m. and 4:00 p.m. Monday through Friday (Coupeville) or 8:00 a.m. and 4:30 p.m. Monday through Friday (Camano Administration Building). For locations, see Contact Us.

We accept all types of payments in person, including: Personal Checks, Money Orders, Bank/Cashier's Checks, U.S. Currency, and Credit/Debit Cards (Fees may apply).


After hours, you may drop your payment in the secure outside drop box located behind the Administration Building off 6th Street in Coupeville. Park in the customer parking lot and you will find the drop box next to the glass door (local deer found it, see photo, left). During the months of April and October you may also place your payment in the inside drop box during our regular office hours.

The Camano Administration Building Drop Box is located to the left of the main door.​

The drop boxes are provided for your convenience after hours.  However, we encourage paying at the counter to receive a receipt for your payment.

Please DO NOT put cash in drop boxes.



Pay online from your United States bank checking account with E-check or with your credit card 24 hours a day, 7 days a week. There is no fee assessed for e-check payments. Credit cards are assessed a fee equal to 2.4% of the total amount paid.  VISA Debit has a special flat fee of $3.95 per transaction.  These fees are assessed by the agency processing the payments and are not paid to Island County.

Click h​ere for further information on how to submit an ​online payment.


If you wish to pay by telephone, you can phone the International Voice Recognition Line (IVR) 24 hours a day, 7 days a week.  The toll free number is 1-866-874-2060.  You will need your Property ID number from your tax statement to proceed. 



​The Treasurer's office has made available a program that automatically withdraws your property tax payment from your U.S. checking or savings account on the pre-determined date via an ACH transaction. Click here to learn more about the AutoPay program. Please include a voided check with your enrollment form.

​There is no cost from us to use this program.


To Preserve your right to seek a court ordered refund, you must comply with RCW 84.68.020 and WAC 458.18.215. Please see the link below for more information.

Paying Under Protest

Post dated and third party checks are not accepted. Partial payments are applied, subject to continuing penalty and interest according to the statutes, until paid in full.