EXHIBIT 32.1

    CERTIFICATION OF CHIEF EXECUTIVE OFFICER OF CHEMUNG FINANCIAL CORPORATION PURSUANT TO RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934 AND 19 U.S.C. §1350.

The undersigned, the Chief Executive Officer of Chemung Financial Corporation (the "Corporation"), hereby certifies that, to his knowledge on the date hereof:

a) the Annual Report on Form 10-K of the Corporation for the period ended December 31, 2023, filed on the date hereof with the Securities and Exchange Commission (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

/s/ Anders M. Tomson

Anders M. Tomson

President and Chief Executive Officer

March 13, 2024