Exhibit 23(c)
Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption Experts in the Registration Statement
(Form S-3 No. 333-___) and related Prospectus of Huntington Bancshares Incorporated for the
registration of shares of its common stock, preferred stock, and debt securities and to the
incorporation by reference therein of our report dated January 16, 2004, except for Note 27, as to
which the date is January 27, 2004, and Note 30, as to which the date is February 23, 2005, with
respect to the consolidated financial statements of Huntington Bancshares Incorporated included in
its Annual Report (Form 10-K) for the year ended December 31, 2004, filed with the Securities and
Exchange Commission.
/s/ Ernst & Young LLP
Columbus, Ohio
January 18, 2006