30 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Springfield | 1 | 155,556 | 155,258 | 0.43% | 4,881 | 32 | City |
| Springfield | 2 | 154,795 | 155,258 | -0.06% | 4,857 | 32 | City |
| Chicopee | 3 | 55,415 | 55,444 | 0.06% | 2,419 | 23 | City |
| Chicopee | 4 | 55,365 | 55,444 | -0.03% | 2,417 | 23 | City |
| Westfield | 5 | 40,523 | 40,169 | 0.3% | 876 | 46 | City |
| Westfield | 6 | 40,461 | 40,169 | 0.14% | 875 | 46 | City |
| Holyoke | 7 | 38,003 | 38,139 | 0.44% | 1,795 | 21 | City |
| Holyoke | 8 | 37,762 | 38,139 | -0.2% | 1,784 | 21 | City |
| West Springfield Town | 9 | 29,127 | 28,767 | 0.34% | 1,741 | 17 | City |
| West Springfield Town | 10 | 29,093 | 28,767 | 0.22% | 1,739 | 17 | City |
| Agawam Town | 11 | 29,044 | 28,627 | 1.03% | 1,245 | 23 | City |
| Agawam Town | 12 | 28,779 | 28,627 | 0.1% | 1,234 | 23 | City |
| Ludlow | 13 | 21,328 | 20,763 | 0.99% | 784 | 27 | Town |
| East Longmeadow | 14 | 16,586 | 16,408 | 0.43% | 1,282 | 13 | Town |
| Longmeadow | 15 | 15,754 | 15,813 | 0.27% | 1,733 | 9 | Town |
| Wilbraham | 16 | 14,757 | 14,584 | 0.64% | 669 | 22 | Town |
| Palmer Town | 17 | 12,434 | 12,419 | 0.37% | 394 | 32 | City |
| Palmer Town | 18 | 12,380 | 12,419 | -0.06% | 392 | 32 | City |
| Southwick | 19 | 9,332 | 9,217 | 0.59% | 303 | 31 | Town |
| Monson | 20 | 8,199 | 8,133 | 0.43% | 185 | 44 | Town |
| Hampden | 21 | 4,984 | 4,956 | 0.4% | 254 | 20 | Town |
| Brimfield | 22 | 3,757 | 3,689 | 0.64% | 108 | 35 | Town |
| Holland | 23 | 2,588 | 2,596 | 0.27% | 211 | 12 | Town |
| Wales | 24 | 1,835 | 1,830 | 0.38% | 116 | 16 | Town |
| Russell | 25 | 1,645 | 1,639 | 0.3% | 94 | 17 | Town |
| Granville | 26 | 1,547 | 1,538 | 0.45% | 37 | 42 | Town |
| Chester | 27 | 1,227 | 1,225 | 0.49% | 34 | 37 | Town |
| Blandford | 28 | 1,212 | 1,211 | 0.25% | 23 | 52 | Town |
| Montgomery | 29 | 844 | 819 | 0.84% | 56 | 15 | Town |
| Tolland | 30 | 477 | 470 | 0.63% | 15 | 32 | Town |
Springfield is the largest city in Hampden County, with a population of 155,556.
Tolland is the smallest city in Hampden County, with a population of 477.
There are 30 cities in Hampden County, Massachusetts.