City · Connecticut · United States
Haddam, CT — ZIP codes
1 ZIP code · Lower Connecticut River Valley County
- City
- Haddam
- County
- Lower Connecticut River Valley
- State
- Connecticut
- Country
- United States
- Postal code
- 06438Single source
- Coordinates
- 41.4627, -72.5050 View on OpenStreetMap
- Area codes
- 860, 959
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 06438 | Haddam | 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). Last generated : 2026-08-21. Report an error.