US location post office
ZIP Code 80503
- Zip Code: 80503
- Type: Standard
- Official USPS city name: Longmont
- Official USPS State Code: CO
- Official State Name: Colorado
- ZCTA: TRUE
- Population: 35453.0
- Density: 150.3
- Primary Official County Code: 8013
- Primary Official County Name: Boulder
- Official County Name: Boulder| Larimer
- Official County Code: 08013| 08069
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/Denver (22:40 PM Friday, July 25 2025-07-25 (GMT -0600))
- Geo Point: 40.17005, -105.20362
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