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9500 Civic Center Drive
Thornton, CO 80229
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Thornton Tax Overview 

The City’s Revenue Division is responsible for collection of the following taxes and fees: sales, use, lodging and telephone taxes, and E911 surcharges. They assist businesses and the public in understanding how Thornton’s taxes apply to their operations or purchases. The Sales Tax Division is also responsible for auditing businesses to ensure that they are in compliance with the City Code.

Property taxes are administered by the County. Please contact Adams County directly for questions regarding your property taxes.

Sales Tax Rates

The total combined sales tax rate in Thornton is 8.5%, and is comprised of the following taxes:

City of Thornton 3.75%
State of Colorado 2.90%
RTD/CD 1.10%
Adams County 0.75%


For more information about Sales & Use Tax or other city tax-related items click here.