Home Page >> Connecticut's 169 Cities & Towns >> Middlesex County ZIP Codes
This information is provided as a public service. Please see the Disclaimers before relying on these data.
| Location | ZIP Code | Actual Name (per USPS) |
|---|---|---|
| Location | ZIP Code | Actual Name (per USPS) |
| Bashan, CT | 06424 | (East Hampton) |
| Centerbrook, CT | 06409 | |
| Chester, CT [C1] | 06412 | |
| Clinton, CT | 06413 | |
| Cobalt, CT | 06414 | |
| Cromwell, CT | 06416 | |
| Deep River, CT | 06417, 06419 | WWW.DeepRiverCT.Com (external Site) |
| Durham, CT | 06422 | |
| East Haddam, CT | 06423 | WWW.EastHaddam.Org (external Site) |
| East Hampton, CT [E1] | 06424 | |
| Essex, CT | 06426 | |
| Fenwick, CT | 06475 | (Old Saybrook) |
| Gildersleeve, CT | 06480 | (Portland, CT) |
| Gillette Castle State Park | 06423 | (East Haddam) |
| Haddam, CT | 06438 | |
| Haddam Neck, CT | 06424 | (East Hampton) |
| Higganum, CT [H1] | 06441 | |
| Ivoryton, CT | 06442 | |
| Killingworth, CT [K1] | 06419 | |
| Lake Pocotopaug, CT | 06424 | (East Hampton) |
| Middlefield, CT | 06455 | |
| Middletown, CT | 06457 | |
| Millington, CT | 06423 | (East Haddam) |
| Moodus, CT | 06469 | |
| Old Saybrook, CT | 06475 | |
| Portland, CT | 06480 | |
| Rockfall, CT | 06481 | (Rock Fall, CT, Rockwall, CT, and Rockall, CT are all misspellings) |
| Saybrook Point, CT | 06475 | (Old Saybrook) |
| Westbrook, CT | 06498 | |
| Westfield | 06457 | (Middletown, CT) |
| Winthrop, | 06417 | (Deep River) |
Footnotes
Middlesex County Connecticut is the only Connecticut County that is not named for a city or town within that county. Essex is a town within Middlesex County. That is why Middlesex County is sometimes mistakenly called "Essex County Connecticut".
[C1] Chester, CT in Middlesex County should not be confused with Cheshire, CT (a town in New Haven County).
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[E1] East Hampton, CT in Middlesex County should not be confused with Hampton, CT (a town in Windham County).
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[H1] Higganum, CT in Middlesex County should not be confused with Hockanum, CT (a town in Hartford County).
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[K1] Killingworth, CT in Middlesex County should not be confused with Killingly, CT (a town in Windham County).
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