24 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 6516 | West Haven | 55,147 |
| 6511 | New Haven | 54,744 |
| 6492 | Wallingford | 44,099 |
| 6513 | New Haven | 38,343 |
| 6460 | Milford | 37,084 |
| 6450 | Meriden | 35,896 |
| 6512 | East Haven | 29,347 |
| 6405 | Branford | 28,090 |
| 6514 | Hamden | 25,291 |
| 6473 | North Haven | 24,527 |
| 6451 | Meriden | 24,522 |
| 6437 | Guilford | 22,037 |
| 6518 | Hamden | 19,958 |
| 6515 | New Haven | 18,388 |
| 6443 | Madison | 17,577 |
| 6519 | New Haven | 15,426 |
| 6461 | Milford | 15,256 |
| 6517 | Hamden | 14,867 |
| 6477 | Orange | 14,251 |
| 6525 | Woodbridge | 9,041 |
| 6471 | North Branford | 7,073 |
| 6472 | Northford | 6,414 |
| 6524 | Bethany | 5,280 |
| 6510 | New Haven | 4,205 |
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).