Kenneth Spencer

Benton County Treasurer

Chief Deputy Treasurer


Kirsten Yniguez


Second Half Property Taxes are Due October 31st, 2020



In an abundance of caution and with concern for maintaining the safety and health of the public and our employees, we will be continuing to limit operations at County offices and departments until further notice to continue to help slow the spread of COVID-19 (novel coronavirus). Please utilize the drop boxes outside both the Prosser Courthouse and the Kennewick Annex to make property tax payments. You can also make payments online using our property search. Please contact us via phone or email if you have any questions or need additional help.


Benton County DOES NOT take payments over the phone. Please contact our office if you have any questions or need additional assistance.

Letter from the Treasurer

The Treasurer's Office is the property tax collector for Benton County and the Cities, School Districts, Fire Departments, and all the other taxing authorities in the County. Property Taxes are levied on the property by the various taxing authorities  based on the valuation and current property usage as set by the Assessor's Office.

As the "banker" for Benton County, the County Treasurer's Office is also responsible for collecting all other money other  County departments collect such as fees for services, licenses, and revenues from bond issues and special assessments.

As your Treasurer, I value your opinion and will consider it in establishing policies, designing services and updating our  service to you. If we have let you down, please tell me. If you are pleased, I would like to hear that too.

Kenneth Spencer, Jr.
Benton County Treasurer

Helpful Links

Prosser Office

620 Market St

PO Box 630

Prosser, WA 99350

Kennewick Office

5600 W Canal Dr Ste A

Kennewick, WA 99336

Phone: 509-786-2255 or 509-735-8505

Email: Treasurer@co.benton.wa.us

Hours: 8:30am - 4:30pm Monday - Friday

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