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 | East Hartford (CDP), CT | 51,045 |
| 5 | Manchester (CDP), CT | 36,379 |
| 6 | Newington (CDP), CT | 30,536 |
| 7 | Wethersfield (CDP), CT | 27,298 |
| 8 | Windsor Locks (CDP), CT | 12,613 |
| 9 | Kensington (CDP), CT | 9,962 |
| 10 | Thompsonville (CDP), CT | 8,514 |
| 11 | Glastonbury Center (CDP), CT | 8,459 |
| 12 | Rockville (CDP), CT | 7,920 |
| 13 | Southwood Acres (CDP), CT | 7,879 |
| 14 | Hazardville (CDP), CT | 6,870 |
| 15 | Simsbury Center (CDP), CT | 6,268 |
| 16 | Sherwood Manor (CDP), CT | 5,372 |
| 17 | Broad Brook (CDP), CT | 3,998 |
| 18 | Weatogue (CDP), CT | 2,906 |
| 19 | Blue Hills (CDP), CT | 2,762 |
| 20 | West Simsbury (CDP), CT | 2,521 |