Exhibit 15
August 8, 2025
Securities and Exchange Commission
450 Fifth Street, NW
Washington, DC 20549
RE: FILING OF THE JUNE 30, 2025 FORM 10-Q FOR TRUSTCO BANK CORP NY
Commissioners:
We are aware that our report dated August 8, 2025, on our reviews of the interim financial
information of TrustCo Bank Corp NY as of June 30, 2025 and for the three and six-month periods ended June 30, 2025 and 2024, included in the
Company's quarterly report on Form 10-Q for the quarter ended June 30, 2025, is incorporated by reference in its Registration Statements, Form S-8 (No. 333-175868), Form S-8 (No. 333-233122), Form S-8 (No. 333-175867), Form S-8 (No. 333-206685),
Form S-8 (333-272169), and Form S-3 (333-272184).
Yours very truly,
/s/ Crowe LLP