| District ID | 1st District |
| Representative | Richard Neal |
| Party Affiliation | Democrat |
| Partisan Voting Index (PVI) | D+12 |
| 01585 |
| 01571 |
| 01570 |
| 01566 |
| 01562 |
| 01550 |
| 01542 |
| 01540 |
| 01537 |
| 01535 |
| 01531 |
| 01521 |
| 01518 |
| 01515 |
| 01507 |
| 01506 |
| 01370 |
| 01367 |
| 01350 |
| 01343 |
| 01339 |
| 01330 |
| 01270 |
| 01267 |
| 01266 |
| 01264 |
| 01262 |
| 01260 |
| 01259 |
| 01258 |
| 01257 |
| 01256 |
| 01255 |
| 01254 |
| 01253 |
| 01247 |
| 01245 |
| 01244 |
| 01243 |
| 01242 |
| 01240 |
| 01238 |
| 01237 |
| 01236 |
| 01235 |
| 01230 |
| 01229 |
| 01226 |
| 01225 |
| 01224 |
| 01223 |
| 01222 |
| 01220 |
| 01201 |
| 01151 |
| 01129 |
| 01128 |
| 01119 |
| 01118 |
| 01109 |
| 01108 |
| 01107 |
| 01106 |
| 01105 |
| 01104 |
| 01103 |
| 01098 |
| 01095 |
| 01092 |
| 01089 |
| 01085 |
| 01083 |
| 01082 |
| 01081 |
| 01080 |
| 01079 |
| 01077 |
| 01075 |
| 01073 |
| 01071 |
| 01070 |
| 01069 |
| 01057 |
| 01056 |
| 01050 |
| 01040 |
| 01036 |
| 01034 |
| 01033 |
| 01030 |
| 01029 |
| 01028 |
| 01027 |
| 01026 |
| 01022 |
| 01020 |
| 01013 |
| 01011 |
| 01010 |
| 01009 |
| 01008 |
| 01007 |
| 01002 |
| 01001 |