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
Grays Harbor County Treasurer
Phone
(360) 249-3751Office Hours
Mon-Fri 8am - 5pm
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Grays Harbor County Treasurer
In Person
Visit the Treasurer's office — 100 W. Broadway, Suite 22, Montesano WA 98563, Mon-Fri 8am - 5pm
Other Counties in Washington
About Grays Harbor County
Grays Harbor County is a county in the U.S. state of Washington. As of the 2020 census, the population was 75,636. Its county seat is Montesano, and its largest city is Aberdeen.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 336 hours before your property taxes are due.
Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.