Lower Connecticut River Valley County, Connecticut ZIP Codes
- ZIP records
26 - Cities represented
25 - Sum of listed ZIP population estimates
175,346
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 06457 | Middletown | 46,720 |
| 2 | 06416 | Cromwell | 14,334 |
| 3 | 06413 | Clinton | 13,377 |
| 4 | 06424 | East Hampton | 12,751 |
| 5 | 06475 | Old Saybrook | 10,575 |
| 6 | 06371 | Old Lyme | 9,828 |
| 7 | 06480 | Portland | 9,434 |
| 8 | 06422 | Durham | 7,208 |
| 9 | 06498 | Westbrook | 6,856 |
| 10 | 06419 | Killingworth | 6,240 |
Cities in Lower Connecticut River Valley County
- Centerbrook
- Chester
- Clinton
- Cobalt
- Cromwell
- Deep River
- Durham
- East Haddam
- East Hampton
- Essex
- Haddam
- Hadlyme
- Higganum
- Ivoryton
- Killingworth
- Middle Haddam
- Middlefield
- Middletown
- Moodus
- Old Lyme
- Old Saybrook
- Portland
- Rockfall
- South Lyme
- Westbrook
ZIP Directory
- ZIP 06371
- ZIP 06376
- ZIP 06409
- ZIP 06412
- ZIP 06413
- ZIP 06414
- ZIP 06416
- ZIP 06417
- ZIP 06419
- ZIP 06422
- ZIP 06423
- ZIP 06424
- ZIP 06426
- ZIP 06438
- ZIP 06439
- ZIP 06441
- ZIP 06442
- ZIP 06455
- ZIP 06456
- ZIP 06457
- ZIP 06459
- ZIP 06469
- ZIP 06475
- ZIP 06480
- ZIP 06481
- ZIP 06498
Browse all ZIP data for Connecticut
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.