| Business | Phone |
| Winthrop Assessors 1 Metcalf Sq # 1, Winthrop 2152 | (617) 846-2716 |
| Winthrop Tax Collector 1 Metcalf Sq # 2, Winthrop 2152 | (617) 846-3226 |
| Winthrop Treasurer 1 Metcalf Sq, Winthrop 2152 | (617) 846-1750 |
| Revenue Collection 1 Metcalf Sq # 2, Winthrop 2152 | (617) 846-0443 |