When are property taxes due in Adams County, Washington?

Adams County property taxes are due April 30. A second installment is due October 31. This deadline applies to all counties in Washington.

What is the penalty for late property tax payment in Adams County, Washington?

The late payment penalty in Adams County is 3% June 1, +8% December 1.

How do I pay Adams County, Washington property taxes?

You can pay Adams County property taxes via Online, mail, in-person.

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Adams County Property Tax Due Date

Name: Treasurer
Address: 210 W Broadway, Suite 203, Ritzville, WA, 99169, US
Telephone: (509) 659-3227

Washington

(509) 659-3227

2026 Property Tax Due Dates

Official Source

Installment 1overdue

April 30

First half

Installment 2in 108 days

October 31

Second half

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Penalty: 3% June 1, +8% December 1Grace period: None

Payment Methods

Online, Mail, In-Person

Adams County Treasurer

Phone

(509) 659-3227

Office Address

210 W Broadway, Suite 203
Ritzville, WA 99169

Get Directions

Office Hours

Mon-Fri 8am - 5pm

How to Pay

Online

Pay using credit card or e-check

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By Mail

Mail check payable to Adams County Treasurer

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In Person

Visit the Treasurer's office — 210 W Broadway, Suite 203, Ritzville WA 99169, Mon-Fri 8am - 5pm

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About Property Taxes in Washington

Washington State property taxes are administered at the county level. Property is assessed at 100% of its true and fair market value as of January 1. Washington levies both a state property tax (used for schools) and local taxes (county, city, school district, fire district, and others). The combined rates vary significantly by county. Washington's property tax system has strong protections for seniors and low-income homeowners, including an exemption that reduces or eliminates taxes for qualifying households regardless of property value.

Payment & Assessment

Washington property taxes are paid in two equal installments: First half: Due April 30 Second half: Due October 31 If the total tax is under $50, the full amount is due April 30. An interest charge of 12% per year applies to late payments, plus a 3% penalty on the first half and 8% on the second half if unpaid. Most counties offer online payment through the county treasurer's website. Contact your county for payment options.

Statewide framework for Washington. Your county's specific rates and deadlines are shown above.

Other Counties in Washington

Asotin Benton Chelan Clallam Clark Columbia Cowlitz Douglas

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About Adams County

Adams County is a county in the U.S. state of Washington. As of the 2020 census, the population was 20,613. The county seat is at Ritzville, and its largest city is Othello. The county was formed out of Whitman County in November 1883 and is named after John Adams, the second President of the United States. Adams County's two most populous cities are Ritzville and Othello. Ritzville is located in the northeastern corner of the county at the junction of I-90 and US 395, making it a popular stop for travelers. Ritzville is an hour's drive from Spokane. Othello is located in the southwestern panhandle of the county.

Source: Wikipedia — content available under CC BY-SA 4.0