City · Colorado · United States

Longmont, CO — ZIP codes

4 ZIP codes · Boulder County

City: Longmont
County: Boulder
State: Colorado
Country: United States
Postal codes: 80501805028050380504
Single source
Coordinates: 40.1779, -105.1009 View on OpenStreetMap

ZIP codes (4)

Postal code	Place name	Verification
80501	Longmont	Single source
80502	Longmont	Single source
80503	Longmont	Single source
80504	Longmont	Single source

Sources and verification

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames. Last generated : 2026-08-21. Report an error.