80503 sales tax details
The minimum combined 2025 sales tax rate for 80503, Colorado is 8.72%. This is the total of state, county, and city sales tax rates. The Colorado sales tax rate is currently 2.9%. The Boulder County sales tax rate is 1.19%.
80503 ZIP Code sales tax rates
80503 ZIP Code sales tax range for 2025
8.72%
Colorado
2.9%
Boulder County
1.19%
Longmont
3.53%
Rtd Greater Denver
1.0%
Scientific & Cultural Fac.(cd)
0.1%
Total rate range
8.72%
*Rates are rounded to the nearest hundredth. Due to varying local sales tax rates, we strongly recommend our lookup and calculator tools on this page for the most accurate rates.
Sales tax rate lookup and sales tax item calculator
Look up the current rate for a specific address using the same geolocation technology that powers the Avalara AvaTax rate calculation engine.
Tax rates can vary within a county, a city, or even a ZIP code. Using a street address helps to ensure more accurate rates and calculations when compared to relying on broader geographic indicators.
*Rates are rounded to the nearest hundredth.
Additional resources
