Level 2 Fire Restrictions in effect for all areas of unincorporated Boulder County (See flyer). For updates on active fires, follow BoulderOEM

COVID-19 updates are available in English and Spanish. See list of Resources (Recursos) for those impacted by COVID-19.

Courthouse art deco relief showing miner and farmer


Due to COVID-19, our offices in Longmont and Lafayette are closed until further notice. Although we do not allow public access to the building, we provide in-person service at our main office in Boulder at 1325 Pearl Street. Contact us at (303) 441-3520 for more information.
Our legal ability to reduce or waive delinquent interest due to COVID-19 expired on October 1. Please see our list of resources for people affected to find out more about resources available to you during this time.
Due to COVID-19, our tax sale briefing and auction procedures have changed. Please see our Tax Lien Sale page for more information.


The Treasurer’s Office collects taxes for real property, mobile homes, and business personal property (business equipment).

On July 1, 2020, the Treasurer became the Public Trustee

The Treasurer is now the Public Trustee. When a real estate loan is paid, the Public Trustee releases the deed of trust, conveying ownership of the property to borrower. The Public Trustee also manages foreclosures ensuring the rights of borrowers and lenders are protected.

If you have any questions, you can contact our office at 303-441-3520, or by email at eforeclosures@bouldercounty.org (foreclosure-related questions) or trustee@bouldercounty.org (general questions).

Paying Taxes

Our online and telephone systems are no longer available for paying this year’s taxes. Taxes must be paid by mail or in our office with certified funds– cash, cashier’s check, or money order. Contact us to ensure you pay the correct amount. If you choose to mail us a payment, do not include cash. Checks and money orders should be made payable to “Boulder County Treasurer.”

Although online payments are no longer being accepted, you can still lookup your taxes and view receipts online.

Look up / pay property taxes

Electronic Property Tax Notices

We now offer the option to receive tax notices by email. Please read the instructions, then click the button below to get started!

Sign up for electronic tax notices

Seniors, Veterans, and Active-Duty Military

The Treasurer’s Office processes applications for:

Senior Property Tax Deferral
Active Military Property Tax Deferral

Tax exemption program applications are processed by the Assessor:

Senior Tax Exemption
Disabled Veterans Tax Exemption

Tax Liens

Once a year, real properties with unpaid taxes are subject to having a tax lien placed on the property.

Tax Lien Sale Information

Contact Us

Treasurer's Office

Phone: 303-441-3520
Fax: 303-441-3598

Treasurer Email


Mailing Address

PO Box 471
Boulder, CO 80306


1325 Pearl St.
1st Floor
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Hours: 8 a.m. - 4:30 p.m.
Monday - Friday

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515 Coffman St.
Suite 113
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Office closed


1376 Miners Dr.
Unit 105
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Office closed