Cowlitz County Treasurer's Office in Kelso, Washington

When visiting this tax collector office, bring your property tax bill or parcel number, a valid photo ID, and your preferred payment method — cash, check, or card. Cowlitz County Treasurer's Office is located at 207 4th Avenue North, Kelso, WA. If you are applying for a homestead or other exemption, bring documentation supporting your eligibility, such as proof of primary residence, veteran discharge papers (DD-214), or a disability certification letter.

About Cowlitz County Treasurer's Office

The Cowlitz County Treasurer's Office, located in Kelso, Washington is responsible for financial transactions, including issuing Cowlitz County tax bills, collecting personal and real property tax payments. The Cowlitz County Treasurer and Tax Collector's Office is part of the Cowlitz County Finance Department that encompasses all financial functions of the local government.

• Property tax bill lookup and payment processing at Cowlitz County Treasurer's Office
• Homestead, senior, veteran, and disability exemption applications
• Delinquent tax payment plans and lien removal procedures
• Tax deed sales, tax lien auctions, and investor registration