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Emergency Alert
Columbia County
341 E. Main St.
Dayton, WA 99328

Chris Mills

341 E. Main St.
Suite 6
Dayton, WA  99328

Ph: (509) 382-2131
Fx: (509) 382-4830

Monday - Friday
8:30 am - 4:30 pm
The county Assessor determines the value of all taxable real and personal property in the county for the purpose of distributing tax liabilities in an equitable manner. 

Tax Exemption Records
The Assessor is also responsible for processing and maintaining records regarding tax exemptions including:
  • Churches
  • Historical properties
  • Public properties
  • Programs like open space and forest land
  • Senior citizens

Property Information
For property information questions, please email Deputy Assessor Melanie Mings or Chief Appraiser Tammy Ketterman or call (509) 382-2131.

News and Announcements
CANCELLED: 1/23/19 BOCC Work Session
The January 23rd work session has been cancelled due to a lack of agenda items.
NOTICE: County Office Closure in Observance of Martin Luther King Jr. Day
All Columbia County offices will be closed on Monday, January 21st in observance of the Martin Luther King Jr. holiday.
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