Exhibit 23.1

​

​

Consent of Independent Registered Public Accounting Firm

​

Flushing Financial Corporation

Uniondale, New York

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-283312) and Form S-8 (No. 333-198021, 333-219707, 333-257162, and 333-281482) of Flushing Financial Corporation (the Company) of our reports dated March 6, 2026, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting which appear in this Annual Report on Form 10-K for the year ended December 31, 2025.

​

​

/s/ BDO USA, LLP

New York, New York

March 6, 2026