Connecticut Gazetteer > Connecticut ZIP Codes > County ZIP Codes > Middlesex ZIP Codes

Also see: ZIP Codes in Middlesex with Associated Cities & Towns

ZIP Codes in Middlesex County with Associated Cities & Towns

Centerbrook   06409
Chester   06412
Clinton   06413
Cobalt   06414
Cromwell   06416
Deep River   06417
Deep River   06419
Durham   06422
East Haddam   06423
 East Hampton   06424
Essex   06426
Haddam   06438
Haddam Neck   06424
Higganum   06441
Ivoryton   06442
Killingworth   06419
Middle Haddam   06456
 Middlefield   06455
Middletown   06457
Middletown   06459
Moodus   06469
Old Saybrook   06475
Portland   06480
Rockfall   06481
Westbrook   06498

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.