2026 Property Tax Due Dates
Installment 1
April 30
First half
Installment 2
October 31
Second half
Penalty: 3% June 1, +8% December 1Grace period: None
Payment Methods
Online, Mail, In-Person
Thurston County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Thurston County Treasurer
In Person
Visit the Treasurer's office — 3000 Pacific Ave SE, Olympia WA 98501, Mon-Fri 8am - 5pm
Other Counties in Washington
About Thurston County
Thurston County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 294,793. The county seat is Olympia, the state capital.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.