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
Grant County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Grant County Treasurer — P.O. Box 37, Ephrata, WA 98823
In Person
Visit the Treasurer's office — 35 C Street Northwest, Ephrata WA 98823, Mon-Fri 8am - 5pm
Other Counties in Washington
About Grant County
Grant County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 99,123. The county seat is Ephrata, and the largest city is Moses Lake.
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.