When are property taxes due in Washington County, Idaho?

Washington County property taxes are due December 20. A second installment is due June 20. This deadline applies to all counties in Idaho.

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

The late payment penalty in Washington County is 2% + 1% per month interest.

How do I pay Washington County, Idaho property taxes?

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

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Washington County Property Tax Due Date

Idaho

(208) 414-0324

2026 Property Tax Due Dates

Official Source

Installment 1

December 20

Full payment or first half

Installment 2

June 20

Second half (if split)

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Penalty: 2% + 1% per month interestGrace period: None

Payment Methods

Online, Mail, In-Person

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Idaho Laws That May Affect Your Property Taxes

Idaho recently changed homestead exemption rules and property assessment methods — effective January 1, 2026. See which bills passed and what they mean for your bill.

View on Tally Idaho →

Washington County Treasurer

Treasurer

Sabrina Young

Phone

(208) 414-0324

Fax

(208) 414-3925

Office Address

256 E Court St
Weiser, ID 83672

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 Washington County Treasurer

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In Person

Visit the Treasurer's office — 256 E Court St, Weiser ID 83672, Mon-Fri 8am - 5pm

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Other Counties in Idaho

Ada Adams Bannock Bear Lake Benewah Bingham Blaine Boise

View all Idaho counties →

About Washington County

Washington County is a county in the U.S. state of Idaho. As of the 2020 census, the population was 10,500. The county seat and largest city is Weiser, with over half of the county's population.

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

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for Washington

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Property Tax FAQ Tax Calendar

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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.