State Street (STT) 10-K 2015 FY Annual report

EXHIBIT 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (Form S-3 No. 333-200321 and Form S-8 No. 333-100001, 333-99989, 333-46678, 333-36793, 333-36409, 333-135696, 333-160171 and 333-183656) of State Street Corporation of our reports dated February 19, 2016, with respect to the consolidated financial statements of State Street Corporation and the effectiveness of internal control over financial reporting of State Street Corporation, included in this Annual Report (Form 10-K) for the year ended December 31, 2015.

/s/ Ernst & Young LLP

Boston, Massachusetts

February 19, 2016