City · New Hampshire · United States
Mount Washington, NH — ZIP codes
1 ZIP code · Coos County
- City
- Mount Washington
- County
- Coos
- State
- New Hampshire
- Country
- United States
- Postal code
- 03589Single source
- Coordinates
- 44.6956, -71.3874 View on OpenStreetMap
- Area code
- 603 (from the nearest rate centre)
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 03589 | Mount Washington | 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. Last generated : 2026-08-21. Report an error.