Visit the Boulder County Ballot Measures website for information about 2025 ballot measures.

Certified funds are now required for all delinquent tax payments. Online tax payments have been disabled for the remainder of the year. You may still view tax account information, including copies of receipts, online.

Property Taxes

Treasurer’s Office

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

Assessor’s Office

The Assessor’s Office calculates the amount of those taxes, determines property values, and handles property tax exemptions for seniors and disabled veterans.

Senior Tax Worker Program

The Senior Tax Worker Program allows senior taxpayers to work in county offices to help pay their county taxes.