80504 Sales Tax Rate
ZIP code 80504 (Longmont, CO) covers 12 sales tax areas with combined rates from 2.9% to 8.865%. See the state, county, city and special district breakdown and calculate the tax. Rates effective July 2026.
ZIP code 80504 crosses city and county lines, so it can have more than one sales tax rate. The rates below belong to the cities and county areas that overlap this ZIP code (based on U.S. Census Bureau ZIP Code Tabulation Areas). Use the calculator with your city, or the state's official address lookup, for an exact address.
Tax area 1: Longmont, Boulder County
- State tax
- 2.9%
- County tax (Boulder)
- 1.335%
- City tax (Longmont)
- 3.53%
- Special district tax
- 1.1%
- Combined rate
- 8.865%
Tax area 2: Longmont, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Longmont)
- 3.53%
- Special district tax
- 1%
- Combined rate
- 7.43%
Tax area 3: Firestone, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Firestone)
- 3.6%
- Special district tax
- 0.5%
- Combined rate
- 7%
Tax area 4: Frederick, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Frederick)
- 3.5%
- Special district tax
- 0.5%
- Combined rate
- 6.9%
Tax area 5: Unincorporated Boulder County
- State tax
- 2.9%
- County tax (Boulder)
- 1.335%
- City tax
- 0%
- Special district tax
- 2.1%
- Combined rate
- 6.335%
Tax area 6: Mead, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Mead)
- 3%
- Special district tax
- 0%
- Combined rate
- 5.9%
Tax area 7: Firestone, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Firestone)
- 2.35%
- Special district tax
- 0.5%
- Combined rate
- 5.75%
Tax area 8: Firestone, Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax (Firestone)
- 2.1%
- Special district tax
- 0.5%
- Combined rate
- 5.5%
Tax area 9: Unincorporated Boulder County
- State tax
- 2.9%
- County tax (Boulder)
- 1.335%
- City tax
- 0%
- Special district tax
- 1.1%
- Combined rate
- 5.335%
Tax area 10: Unincorporated Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax
- 0%
- Special district tax
- 1%
- Combined rate
- 3.9%
Tax area 11: Unincorporated Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax
- 0%
- Special district tax
- 0.5%
- Combined rate
- 3.4%
Tax area 12: Unincorporated Weld County
- State tax
- 2.9%
- County tax (Weld)
- 0%
- City tax
- 0%
- Special district tax
- 0%
- Combined rate
- 2.9%