EXHIBIT 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements of KeyCorp:

Form S-3 No. 333-55959        

Form S-3 No. 333-59175        

Form S-3 No. 333-64601        

Form S-3 No. 333-76619

Form S-3 No. 333-272573            

Form S-8 No. 333-49609        

Form S-8 No. 333-70669                                

Form S-8 No. 333-107074        

Form S-8 No. 333-107075        

Form S-8 No. 333-107076                

Form S-8 No. 333-112225                

Form S-8 No. 333-167093        

Form S-8 No. 333-188703

Form S-8 No. 333-208272

Form S-8 No. 333-231689

Form S-8 No. 333-256086

Form S-8 No. 333-271833

of our reports dated February 22, 2024, with respect to the consolidated financial statements of KeyCorp and the effectiveness of internal control over financial reporting of KeyCorp included in this Annual Report (Form 10-K) of KeyCorp for the year ended December 31, 2023.

Ernst & Young

Cleveland, Ohio

February 22, 2024