City · California · United States
Duncans Mills, CA — ZIP codes
1 ZIP code · Sonoma County
- City
- Duncans Mills
- County
- Sonoma
- State
- California
- Country
- United States
- Postal code
- 95430Single source
- Coordinates
- 38.4538, -123.0550 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 95430 | Duncans Mills | 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.