Winthrop Tax Collector 1 Metcalf Sq # 2 Winthrop, MA 02152 Phone : (617) 846-3226 Business Category Public Finance Taxation & Monetary Policy Winthrop Town Of--treasurers Office 1 Metcalf Sq Winthrop, MA 02152 Phone : (617) 846-3226 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools