Longmont zipcode

ZIP code of Longmont is 80504. This place is located in Colorado state in US. To send any postal service to Longmont, you must use 80504 zipcode.

The ZIP code 80504 is also used with 4 more city names of Colorado.

1. Firestone, CO
2. Frederick, CO
3. Mead, CO
4. Niwot, CO