Middlesex County, Connecticut ZIP codes
23ZIP codes
22Cities and towns
165,364People in ZIP areas
203, 475, 860Area codes
Middlesex County is in Connecticut and the Eastern Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.
All ZIP codes in Middlesex County
| ZIP code | City | Type | Population | Median income |
|---|---|---|---|---|
| 06409 | Centerbrook | Standard | 701 | $107,909 |
| 06412 | Chester | Standard | 3,825 | $109,191 |
| 06413 | Clinton | Standard | 13,377 | $124,824 |
| 06414 | Cobalt | PO Box only | 302 | $131,090 |
| 06416 | Cromwell | Standard | 14,334 | $110,596 |
| 06417 | Deep River | Standard | 4,458 | $90,253 |
| 06419 | Killingworth | Standard | 6,240 | $140,655 |
| 06422 | Durham | Standard | 7,208 | $158,857 |
| 06423 | East Haddam | Standard | 5,182 | $107,549 |
| 06424 | East Hampton | Standard | 12,751 | $123,680 |
| 06426 | Essex | Standard | 3,267 | $103,705 |
| 06438 | Haddam | Standard | 2,887 | $121,429 |
| 06441 | Higganum | Standard | 5,348 | $111,250 |
| 06442 | Ivoryton | Standard | 2,826 | $104,358 |
| 06455 | Middlefield | Standard | 2,480 | $104,180 |
| 06456 | Middle Haddam | PO Box only | 281 | $128,542 |
| 06457 | Middletown | Standard | 46,720 | $79,463 |
| 06459 | Middletown | Unique | 1,238 | – |
| 06469 | Moodus | Standard | 3,311 | $104,888 |
| 06475 | Old Saybrook | Standard | 10,575 | $114,333 |
| 06480 | Portland | Standard | 9,434 | $118,929 |
| 06481 | Rockfall | Standard | 1,763 | $84,674 |
| 06498 | Westbrook | Standard | 6,856 | $91,202 |
Cities and towns in Middlesex County
- Middletown 2 ZIPs
- Centerbrook 1 ZIP
- Chester 1 ZIP
- Clinton 1 ZIP
- Cobalt 1 ZIP
- Cromwell 1 ZIP
- Deep River 1 ZIP
- Durham 1 ZIP
- East Haddam 1 ZIP
- East Hampton 1 ZIP
- Essex 1 ZIP
- Haddam 1 ZIP
- Higganum 1 ZIP
- Ivoryton 1 ZIP
- Killingworth 1 ZIP
- Middle Haddam 1 ZIP
- Middlefield 1 ZIP
- Moodus 1 ZIP
- Old Saybrook 1 ZIP
- Portland 1 ZIP
- Rockfall 1 ZIP
- Westbrook 1 ZIP
Area codes in Middlesex County
Questions
- How many ZIP codes are in Middlesex County, CT?
- Middlesex County has 23 ZIP codes, 20 of them standard ZIP codes for street addresses.
- What cities are in Middlesex County?
- Middlesex County ZIP codes cover Middletown, Centerbrook, Chester, Clinton, Cobalt, Cromwell, Deep River and Durham and 14 other places.
- What area code is Middlesex County, CT?
- Middlesex County uses area codes 203, 475, 860 and 959.
- What time zone is Middlesex County in?
- Middlesex County is in Eastern Time.