38 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hartford | 1 | 122,959 | 120,469 | 0.34% | 7,075 | 17 | City |
| New Britain | 2 | 77,335 | 72,943 | 0.96% | 5,773 | 13 | City |
| West Hartford | 3 | 64,740 | 63,118 | 0.43% | 2,965 | 22 | Township |
| Manchester | 4 | 60,454 | 59,500 | 0.42% | 2,205 | 27 | Township |
| East Hartford | 5 | 51,519 | 50,877 | 0.38% | 2,861 | 18 | Township |
| Southington | 6 | 44,721 | 43,431 | 0.59% | 1,247 | 36 | Township |
| Enfield | 7 | 41,424 | 41,185 | 0.34% | 1,243 | 33 | Township |
| Glastonbury | 8 | 35,901 | 35,065 | 0.49% | 700 | 51 | Township |
| Newington | 9 | 31,962 | 30,425 | 0.42% | 2,432 | 13 | Township |
| Vernon | 10 | 31,173 | 30,168 | 0.45% | 1,759 | 18 | Township |
| Mansfield | 11 | 29,910 | 19,446 | 3.31% | 670 | 45 | Township |
| Windsor | 12 | 29,872 | 29,341 | 0.36% | 1,012 | 30 | Township |
| Farmington | 13 | 29,777 | 26,635 | 2.74% | 1,067 | 28 | Township |
| Wethersfield | 14 | 27,590 | 27,242 | 0.4% | 2,243 | 12 | Township |
| South Windsor | 15 | 27,352 | 26,868 | 0.53% | 975 | 28 | Township |
| Simsbury | 16 | 25,565 | 24,499 | 0.42% | 753 | 34 | Township |
| Bloomfield | 17 | 22,536 | 21,447 | 0.76% | 864 | 26 | Township |
| Rocky Hill | 18 | 22,459 | 20,755 | 2.48% | 1,668 | 13 | Township |
| Berlin | 19 | 20,854 | 20,134 | 0.5% | 793 | 26 | Township |
| Avon | 20 | 19,324 | 18,875 | 0.57% | 834 | 23 | Township |
| Plainville | 21 | 18,067 | 17,457 | 0.87% | 1,861 | 10 | Township |
| Ellington | 22 | 16,761 | 16,388 | 0.53% | 492 | 34 | Township |
| Suffield | 23 | 16,432 | 15,684 | 1.44% | 389 | 42 | Township |
| Tolland | 24 | 14,907 | 14,530 | 0.57% | 376 | 40 | Township |
| Windsor Locks | 25 | 12,735 | 12,577 | 0.36% | 1,411 | 9 | Township |
| Granby | 26 | 12,665 | 10,890 | 3.74% | 311 | 41 | Township |
| Coventry | 27 | 12,595 | 12,220 | 0.6% | 335 | 38 | Township |
| Stafford | 28 | 11,794 | 11,414 | 0.43% | 203 | 58 | Township |
| East Windsor | 29 | 11,437 | 11,148 | 0.6% | 436 | 26 | Township |
| Somers | 30 | 11,177 | 10,080 | 1.23% | 393 | 28 | Township |
| Canton | 31 | 10,419 | 10,086 | 0.71% | 424 | 25 | Township |
| Hebron | 32 | 9,384 | 9,071 | 0.7% | 254 | 37 | Township |
| Marlborough | 33 | 6,264 | 6,102 | 0.58% | 268 | 23 | Township |
| Willington | 34 | 5,667 | 5,552 | 0.51% | 170 | 33 | Township |
| Columbia | 35 | 5,403 | 5,266 | 0.41% | 253 | 21 | Township |
| East Granby | 36 | 5,342 | 5,208 | 0.6% | 304 | 18 | Township |
| Bolton | 37 | 4,965 | 4,846 | 0.71% | 345 | 14 | Township |
| Andover | 38 | 3,211 | 3,146 | 0.53% | 208 | 15 | Township |
Hartford is the largest city in Capitol Planning Region, with a population of 122,959.
Andover is the smallest city in Capitol Planning Region, with a population of 3,211.
There are 38 cities in Capitol Planning Region, Connecticut.