24 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 6511 | New Haven | 55,940 |
| 6516 | West Haven | 55,336 |
| 6492 | Wallingford | 44,267 |
| 6513 | New Haven | 38,217 |
| 6460 | Milford | 37,208 |
| 6450 | Meriden | 36,074 |
| 6512 | East Haven | 29,522 |
| 6405 | Branford | 28,041 |
| 6514 | Hamden | 25,687 |
| 6473 | North Haven | 24,588 |
| 6451 | Meriden | 24,482 |
| 6437 | Guilford | 22,046 |
| 6518 | Hamden | 20,849 |
| 6515 | New Haven | 19,749 |
| 6443 | Madison | 17,658 |
| 6519 | New Haven | 16,050 |
| 6461 | Milford | 15,075 |
| 6517 | Hamden | 14,287 |
| 6477 | Orange | 14,231 |
| 6525 | Woodbridge | 9,050 |
| 6471 | North Branford | 7,195 |
| 6472 | Northford | 6,501 |
| 6524 | Bethany | 5,295 |
| 6510 | New Haven | 3,966 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 24 ZCTAs in South Central CT Planning Region, Connecticut (US Census).