City · Colorado · United States
Longmont, CO — ZIP codes
4 ZIP codes · Boulder County
- City
- Longmont
- County
- Boulder
- State
- Colorado
- Country
- United States
- Postal codes
- 80501805028050380504Single source
- Coordinates
- 40.1779, -105.1009 View on OpenStreetMap
- Area codes
- 720, 303, 983
ZIP codes (4)
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 · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.