Fastest growing counties in Connecticut.
County | Rank | Change (2020) | 2024 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Northeastern CT Planning Region | 1 | 2.12% | 97,236 | 95,222 |
| Naugatuck Valley Planning Region | 2 | 2.09% | 458,666 | 449,285 |
| Lower CT River Valley Planning Region | 3 | 1.84% | 176,448 | 173,268 |
| Capitol Planning Region | 4 | 1.68% | 978,588 | 962,436 |
| Northwest Hills Planning Region | 5 | 1.29% | 113,649 | 112,202 |
| Greater Bridgeport Planning Region | 6 | 1.17% | 328,177 | 324,387 |
| Western CT Planning Region | 7 | 1.07% | 624,957 | 618,368 |
| South Central CT Planning Region | 8 | 0.68% | 567,914 | 564,076 |
| Southeastern CT Planning Region | 9 | 0.6% | 280,011 | 278,342 |