Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Hartford (city), CT | 121,054 |
| 2 | New Britain (city), CT | 74,135 |
| 3 | West Hartford (CDP), CT | 64,083 |
| 4 | Meriden (city), CT | 60,850 |
| 5 | Bristol (city), CT | 60,833 |
| 6 | East Hartford (CDP), CT | 51,045 |
| 7 | Middletown (city), CT | 47,717 |
| 8 | Manchester (CDP), CT | 36,379 |
| 9 | Newington (CDP), CT | 30,536 |
| 10 | Wethersfield (CDP), CT | 27,298 |
| 11 | North Haven (CDP), CT | 24,253 |
| 12 | Wallingford Center (CDP), CT | 18,278 |
| 13 | Windsor Locks (CDP), CT | 12,613 |
| 14 | Kensington (CDP), CT | 9,962 |
| 15 | Thompsonville (CDP), CT | 8,514 |
| 16 | Glastonbury Center (CDP), CT | 8,459 |
| 17 | Rockville (CDP), CT | 7,920 |
| 18 | Southwood Acres (CDP), CT | 7,879 |
| 19 | Cheshire Village (CDP), CT | 6,499 |
| 20 | Portland (CDP), CT | 5,813 |