26 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 06010 | Bristol | 61,206 |
| 06484 | Shelton | 41,402 |
| 06770 | Naugatuck | 31,671 |
| 06704 | Waterbury | 30,666 |
| 06708 | Waterbury | 29,103 |
| 06410 | Cheshire | 28,792 |
| 06705 | Waterbury | 26,352 |
| 06488 | Southbury | 19,973 |
| 06401 | Ansonia | 19,160 |
| 06483 | Seymour | 16,799 |
| 06716 | Wolcott | 16,058 |
| 06706 | Waterbury | 15,546 |
| 06795 | Watertown | 14,409 |
| 06478 | Oxford | 12,870 |
| 06418 | Derby | 12,150 |
| 06798 | Woodbury | 9,787 |
| 06710 | Waterbury | 9,669 |
| 06786 | Terryville | 9,617 |
| 06712 | Prospect | 9,414 |
| 06779 | Oakville | 7,762 |
| 06762 | Middlebury | 7,736 |
| 06787 | Thomaston | 7,493 |
| 06403 | Beacon Falls | 6,089 |
| 06751 | Bethlehem | 3,398 |
| 06702 | Waterbury | 3,117 |
| 06782 | Plymouth | 2,098 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 26 ZCTAs in Naugatuck Valley Planning Region, Connecticut (US Census).