2026 Property Tax Due Dates
April 30
First half
October 31
Second half
Payment Methods
Online, Mail, In-Person
Whatcom County Treasurer
Phone
(360) 676-6774Office Hours
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Whatcom County Treasurer
In Person
Visit the Treasurer's office — 311 Grand Ave, Suite 104, Bellingham WA 98225, Mon-Fri 8:30am - 4:30pm
Other Counties in Washington
About Whatcom County
Whatcom County (, ) is a county located in the northwestern corner of the U.S. state of Washington, bordered by the Lower Mainland (the Metro Vancouver and Fraser Valley Regional Districts) of the Canadian province of British Columbia to the north, Okanogan County to the east, Skagit County to the south, San Juan County across Rosario Strait to the southwest, and the Strait of Georgia to the west. Its county seat and largest population center is the coastal city of Bellingham. Whatcom County is coterminous with the Bellingham, WA Metropolitan Statistical Area. As of the 2020 census, the county's population was 226,847.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 14 days 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.