City · Oklahoma · United States
Newcastle, OK — ZIP codes
1 ZIP code · McClain County
- City
- Newcastle
- County
- McClain
- State
- Oklahoma
- Country
- United States
- Postal code
- 73065Single source
- Coordinates
- 35.2453, -97.6216 View on OpenStreetMap
- Area code
- 405
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 73065 | Newcastle | 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.