39 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 1085 | Westfield | 41,466 |
| 1040 | Holyoke | 37,949 |
| 1109 | Springfield | 31,418 |
| 1020 | Chicopee | 30,230 |
| 1089 | West Springfield | 28,635 |
| 1108 | Springfield | 27,409 |
| 1013 | Chicopee | 22,950 |
| 1104 | Springfield | 21,745 |
| 1056 | Ludlow | 20,846 |
| 1028 | East Longmeadow | 16,283 |
| 1001 | Agawam | 16,136 |
| 1106 | Longmeadow | 15,961 |
| 1118 | Springfield | 15,009 |
| 1095 | Wilbraham | 14,615 |
| 1119 | Springfield | 14,059 |
| 1030 | Feeding Hills | 12,374 |
| 1107 | Springfield | 12,270 |
| 1105 | Springfield | 11,469 |
| 1151 | Indian Orchard | 9,627 |
| 1077 | Southwick | 9,222 |
| 1069 | Palmer | 9,077 |
| 1057 | Monson | 8,200 |
| 1129 | Springfield | 5,993 |
| 1036 | Hampden | 4,937 |
| 1010 | Brimfield | 3,694 |
| 1128 | Springfield | 3,252 |
| 1521 | Holland | 2,576 |
| 1103 | Springfield | 2,336 |
| 1080 | Three Rivers | 2,308 |
| 1034 | Granville | 2,100 |
| 1022 | Chicopee | 2,045 |
| 1081 | Wales | 1,704 |
| 1008 | Blandford | 1,324 |
| 1071 | Russell | 1,219 |
| 1011 | Chester | 1,205 |
| 1009 | Bondsville | 790 |
| 1079 | Thorndike | 282 |
| 1097 | Woronoco | 45 |
| 1144 | Springfield | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 39 ZCTAs in Hampden County, Massachusetts (US Census).