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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  or call (509) 382-2131.

News and Announcements
NOTICE: Special Meeting of the Board of Commissioners
A special meeting of the Board of Commissioner has been scheduled for Tuesday, November 24th at 10:00 am in the Commissioner's office, 341 E Main Street. Please see the attached agenda for further information. Read on...
Notice of Public Hearing for Six Year TIP, 2016 Preservation Program and Construction Program
A Public Hearing will be held at 10:01 a.m. on 2 December 2015 for the Board of Columbia County Commissioners to consider the adoption of the Columbia County Six Year Transportation Improvement Program from 2016 to 2021; and Read on...
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