| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| New Haven | 1 | 140,916 | 129,319 | 1.54% | 7,540 | 19 | City |
| Hamden | 2 | 61,729 | 60,761 | -0.15% | 1,892 | 33 | Township |
| Meriden | 3 | 60,871 | 60,616 | 0.1% | 2,565 | 24 | City |
| West Haven | 4 | 55,318 | 55,508 | -0.06% | 5,146 | 11 | City |
| Wallingford | 5 | 44,395 | 44,519 | -0.02% | 1,134 | 39 | Township |
| Branford | 6 | 28,985 | 28,133 | 0.91% | 1,327 | 22 | Township |
| East Haven | 7 | 27,886 | 27,835 | -0.14% | 2,268 | 12 | Township |
| North Haven | 8 | 24,792 | 24,089 | -0.03% | 1,190 | 21 | Township |
| Guilford | 9 | 22,382 | 22,017 | 0.27% | 475 | 47 | Township |
| Madison | 10 | 17,766 | 17,613 | 0.18% | 491 | 36 | Township |
| Orange | 11 | 14,392 | 14,235 | -0.17% | 838 | 17 | Township |
| North Branford | 12 | 13,545 | 13,501 | -0.04% | 547 | 25 | Township |
| Woodbridge | 13 | 9,207 | 9,037 | 0.51% | 489 | 19 | Township |
| Bethany | 14 | 5,333 | 5,301 | -0.11% | 253 | 21 | Township |
New Haven is the largest city in South Central Connecticut Planning Region, with a population of 140,916.
Bethany is the smallest city in South Central Connecticut Planning Region, with a population of 5,333.
There are 14 cities in South Central Connecticut Planning Region, Connecticut.