City · Colorado · United States
New Castle, CO — ZIP codes
1 ZIP code · Garfield County
- City
- New Castle
- County
- Garfield
- State
- Colorado
- Country
- United States
- Postal code
- 81647Single source
- Coordinates
- 39.5709, -107.5428 View on OpenStreetMap
- Area code
- 970
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 81647 | New Castle | 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 · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.