| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hartford | 1 | 122,321 | 120,479 | 0.28% | 7,038 | 17 | City |
| New Britain | 2 | 76,969 | 72,941 | 0.9% | 5,746 | 13 | City |
| West Hartford | 3 | 64,694 | 63,092 | 0.7% | 2,962 | 22 | Township |
| Manchester | 4 | 59,888 | 59,495 | 0.19% | 2,184 | 27 | Township |
| East Hartford | 5 | 51,022 | 50,875 | 0.11% | 2,833 | 18 | Township |
| Southington | 6 | 44,422 | 43,433 | 0.41% | 1,238 | 36 | Township |
| Enfield | 7 | 41,302 | 41,180 | 0.39% | 1,240 | 33 | Township |
| Glastonbury | 8 | 35,593 | 35,071 | 0.25% | 694 | 51 | Township |
| Newington | 9 | 31,689 | 30,417 | 0.13% | 2,411 | 13 | Township |
| Vernon | 10 | 30,890 | 30,156 | 0.16% | 1,744 | 18 | Township |
| Windsor | 11 | 30,192 | 29,337 | 1.05% | 1,023 | 30 | Township |
| Farmington | 12 | 29,207 | 26,634 | 2.01% | 1,047 | 28 | Township |
| Mansfield | 13 | 29,101 | 19,443 | 0.13% | 652 | 45 | Township |
| Wethersfield | 14 | 27,334 | 27,230 | 0.16% | 2,222 | 12 | Township |
| South Windsor | 15 | 27,096 | 26,869 | 0.22% | 966 | 28 | Township |
| Simsbury | 16 | 25,911 | 24,491 | 1.29% | 764 | 34 | Township |
| Bloomfield | 17 | 22,416 | 21,444 | 0.67% | 859 | 26 | Township |
| Rocky Hill | 18 | 21,815 | 20,763 | 1.11% | 1,620 | 13 | Township |
| Berlin | 19 | 20,808 | 20,144 | 0.53% | 791 | 26 | Township |
| Avon | 20 | 19,142 | 18,879 | 0.24% | 827 | 23 | Township |
| Plainville | 21 | 17,804 | 17,457 | 0.33% | 1,834 | 10 | Township |
| Ellington | 22 | 16,646 | 16,397 | 0.31% | 489 | 34 | Township |
| Suffield | 23 | 16,180 | 15,682 | 0.84% | 383 | 42 | Township |
| Tolland | 24 | 14,808 | 14,528 | 0.38% | 374 | 40 | Township |
| Windsor Locks | 25 | 12,631 | 12,576 | 0.11% | 1,400 | 9 | Township |
| Coventry | 26 | 12,498 | 12,222 | 0.42% | 333 | 38 | Township |
| Granby | 27 | 12,212 | 10,889 | 2.08% | 300 | 41 | Township |
| Stafford | 28 | 11,791 | 11,410 | 0.6% | 203 | 58 | Township |
| East Windsor | 29 | 11,391 | 11,151 | 0.43% | 434 | 26 | Township |
| Somers | 30 | 10,993 | 10,082 | 0.5% | 386 | 28 | Township |
| Canton | 31 | 10,366 | 10,086 | 0.6% | 422 | 25 | Township |
| Hebron | 32 | 9,300 | 9,059 | 0.48% | 252 | 37 | Township |
| Marlborough | 33 | 6,232 | 6,106 | 0.31% | 267 | 23 | Township |
| Willington | 34 | 5,611 | 5,551 | 0.18% | 169 | 33 | Township |
| East Granby | 35 | 5,605 | 5,208 | 3.18% | 319 | 18 | Township |
| Columbia | 36 | 5,365 | 5,267 | 0.24% | 251 | 21 | Township |
| Bolton | 37 | 4,883 | 4,843 | 0.16% | 339 | 14 | Township |
| Andover | 38 | 3,178 | 3,147 | 0.16% | 206 | 15 | Township |
Hartford is the largest city in Capitol Planning Region, with a population of 122,321.
Andover is the smallest city in Capitol Planning Region, with a population of 3,178.
There are 38 cities in Capitol Planning Region, Connecticut.