Lower Connecticut River Valley Planning Region ZIP Codes
Lower Connecticut River Valley Planning Region is a planning region of Connecticut.
- ZIP codes
- 25
- Cities & towns
- 24
- Area codes
- 4
- Land area
- 424 sq mi
Every ZIP code in Lower Connecticut River Valley Planning Region
| ZIP code | City |
|---|---|
| 06371 | Old Lyme |
| 06376 | South Lyme |
| 06409 | Centerbrook |
| 06412 | Chester |
| 06413 | Clinton |
| 06414 | Cobalt |
| 06416 | Cromwell |
| 06417 | Deep River |
| 06419 | Killingworth |
| 06422 | Durham |
| 06423 | East Haddam |
| 06424 | East Hampton |
| 06426 | Essex |
| 06438 | Haddam |
| 06439 | Hadlyme |
| 06441 | Higganum |
| 06442 | Ivoryton |
| 06455 | Middlefield |
| 06456 | Middle Haddam |
| 06457 | Middletown |
| 06459 | Middletown |
| 06469 | Moodus |
| 06475 | Old Saybrook |
| 06480 | Portland |
| 06498 | Westbrook |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Lower Connecticut River Valley Planning Region codes above are listed without a column we would have to invent.
Cities and towns in Lower Connecticut River Valley Planning Region
A further 23 places in Lower Connecticut River Valley Planning Region appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.
Area codes covering Lower Connecticut River Valley Planning Region
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the planning region without matching its edges.
Where Lower Connecticut River Valley Planning Region's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every ZIP code recorded in Lower Connecticut River Valley Planning Region. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.