| Business | Phone |
| Millbury Assessors 127 Elm St, Millbury 1527 | (508) 865-4732 |
| Millbury Auditor 127 Elm St, Millbury 1527 | (508) 865-9132 |
| Millbury Tax Collector 127 Elm St, Millbury 1527 | (508) 865-9121 |
| Millbury Treasurer 127 Elm St, Millbury 1527 | (508) 865-8040 |