Exhibit 23.1
| KPMG LLP | |
| Two Financial Center | |
| 60 South Street | |
| Boston, MA 02111 |
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Current Report on Form 8-K/A of our reports dated March 3, 2025, with respect to the consolidated financial statements of Brookline Bancorp, Inc. and the effectiveness of internal control over financial reporting.
Boston, Massachusetts
November 17, 2025
| KPMG LLP, a Delaware limited liability partnership and a member firm of the KPMG global organization of independent member firms affiliated with KPMG International Limited, a private English company limited by guarantee. |