Exhibit 15.1
May 11, 2020
Securities and Exchange Commission
450 Fifth Street, NW
Washington, DC 20549
RE: FILING ON THE MARCH 31, 2020 FORM 10-Q FOR TRUSTCO BANK CORP NY
Commissioners:
We are aware that our report dated May 8, 2020, on our review of the interim financial information of TrustCo Bank Corp NY for the three-month periods ended March 31, 2020 and 2019, included in TrustCo Bank Corp NY’s quarterly report on Form 10-Q
for the quarter ended March 31, 2020, is incorporated by reference in this Registration Statement on Form S-3.
Yours very truly,
/s/Crowe LLP