Benton County, WA Treasurer's Offie

Kenneth Spencer

Benton County Treasurer

Chief Deputy Treasurer


Benton County, Washington Treasurer Home Page

Kirsten Yniguez

Benton County Property Search is having connectivity issues at the moment. We are aware of the issue and working towards a solution. Please call our office for assistance 509-735-8505.



Benton County, WA News

The Treasurer's Office will be CLOSED

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Monday, January 17
in observance of
Martin Luther King Jr. Day

Treasurer's Office Closed

In an abundance of caution and with concern for maintaining the safety and health of the public and our employees, the Benton County Treasurer’s offices will be closed to the public as a precautionary measure to help slow the spread of COVID-19 (novel coronavirus).

Property tax payments can be made via the mail, or drop boxes are open and checked daily at the Prosser Courthouse and the Kennewick Annex (checks only please). For tax information or to pay via e-check, debit or credit card, please visit our website www.bentoncountytax.com. If you have Real Estate Excise transactions, please email your documents to Treasurer@co.benton.wa.us for review. Additional services are available by appointment.

To get in touch with our office, please contact us at the phone number or email below. Thank you for your understanding as we work to help slow the spread of COVID-19.


Benton County, WA Business Hours

Prosser Office hours:

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

Closed for Lunch                          12:00pm - 1:00pm

Saturday                                        CLOSED

Sunday                                          CLOSED

Kennewick Office hours:

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

Saturday                                        CLOSED

Sunday                                          CLOSED


Benton County, WA Contact Information

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