7 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Greenwich | Western CT Planning Region | 65,196 |
| Groton | Southeastern CT Planning Region | 39,668 |
| Glastonbury | Capitol Planning Region | 35,727 |
| Guilford | South Central CT Planning Region | 22,375 |
| Granby | Capitol Planning Region | 12,208 |
| Griswold | Southeastern CT Planning Region | 11,731 |
| Goshen | Northwest Hills Planning Region | 3,295 |