Assessor's Office

NOTICE:  Effective immediately, all county offices in the courthouse are closed to the walk-in public in an effort to practice social distancing during the COVID-19 pandemic and to protect our employees and the public we serve.  We are still working and available through phone or email.  The Assessor’s Office is encouraging citizens with immediate assessment and taxation needs to please call our office at 503-397-2240 or email  For non-immediate needs, we ask that you wait until this pandemic event has passed.

Welcome from Columbia County Assessor Sue Martin

Thank you for visiting the webpage of the Columbia County Assessor.  Please know that my staff and I are committed to using a proven foundation to establish fair and equitable property values in the county.  Your property taxes are vitally important to the economic health and sustainability of Columbia County.  Please feel free to contact us about any concern you have about property assessment or your eligibility for available property tax relief programs.

About the Assessor's Office

The Columbia County Assessor is an elected official whose role is to establish a fair and equitable real market value on all real property and business personal property for tax purposes in accordance with Oregon Property Tax Laws.  The assessor is responsible for the administration of all property tax data records and maintains accurate parcel ownership data based upon recorded property transactions at the Columbia County Clerk's Office.

The major duties of the Assessor are locate and identify each property; inventory, classify, value and calculate the tax on each property; prepare and certify the annual assessment roll for the county; and respond to all property value appeals.

Property Records Online

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A & T Web Query                              Columbia County Web Map

Assessors quick links
230 Strand St.
Columbia County Courthouse Annex
St. Helens,
Fax: 503-397-5153

Monday - Friday
8:30 a.m. to 5:00 p.m.
We are available by phone and email only. Please allow 1 full business day for a response. Thank you for your patience.
County Assessor
Sue Martin