Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements of Huntington
Bancshares Incorporated and subsidiaries (the Company) of our reports dated February 21, 2007,
relating to the financial statements of the Company and managements report on the effectiveness of
internal control over financial reporting, appearing in this Annual Report on Form 10-K of the
Company for the year ended December 31, 2006.
Form S-3ASR No. 333-131143 pertaining to Huntington Bancshares Incorporated automatic shelf
registration of common stock, preferred stock, and debt securities dated January 19, 2006.
Form S-3 No. 33-52569 pertaining to Huntington Bancshares Incorporated Dividend Reinvestment and
Common Stock Purchase Plan Post-Effective Amendment No. 2 dated September 25, 1998;
Form S-3 Nos. 333-53579-01, 333-53579-02, 333-53579-03, 333-53579-04, and 333-53579-05 pertaining
to Huntington Bancshares Incorporated and Huntington Capital II, III, IV, V, and VI, respectively,
in connection with the registration of capital securities dated May 26, 1998 and amended June 5,
1998.
Form S-8 No. 333-136692 pertaining to Huntington Bancshares Incorporated Executive Deferred
Compensation Plan dated August 17, 2006;
Form S-8 No. 333-113639 pertaining to the UNB Corp. 1987 Stock Option and Performance Unit Plan,
UNB Corp. 1997 Stock Option Plan and BancFirst Ohio Corp. 1997 Omnibus Stock Incentive Plan
Post-Effective Amendment No. 1 on Form S-8 to Form S-4 dated March 16, 2004;
Form S-8 No. 333-126256 pertaining to Huntington Bancshares Incorporated 2004 Stock and Long-Term
Incentive Plan as filed on June 30, 2005.
Form S-8 No. 333-61074 pertaining to Huntington Bancshares Incorporated 2001 Stock and Long-Term
Incentive Plan Post-Effective Amendment No. 1 dated June 30, 2005;
Form S-8 No. 333-75032 pertaining to Huntington Bancshares Incorporated Employee Stock Incentive
Plan dated December 13, 2001;
Form S-8 No. 33-44208 pertaining to Huntington Supplemental Executive Stock Purchase and Tax
Savings Plan and Trust Post-Effective Amendment No. 1 dated April 1, 1998;
Form S-8 No. 33-46327 pertaining to Huntington Investment and Tax Savings Plan Post-Effective
Amendment No. 1 dated April 1, 1998;
Form S-8 No. 33-52553 pertaining to Huntington Bancshares Incorporated 1994 Stock Option Plan dated
March 8, 1994;
Form S-8 No. 33-38784 pertaining to Huntington Bancshares Incorporated 1990 Stock Option Plan dated
January 28, 1991;
Form S-8 No. 33-10546 pertaining to Huntington Bancshares Incorporated Deferred Compensation Plan
for Directors Post-Effective Amendment No. 2 dated January 28, 1991;
Form S-8 No. 33-41774 pertaining to Huntington Bancshares Incorporated Deferred Compensation Plan
for Huntington Bancshares Incorporated Directors dated July 19, 1991;
Form S-8 No. 33-37373 pertaining to Huntington Bancshares Incorporated 1990 Stock Option Plan dated
October 18, 1990;
Form S-11 (no file number) filed with the Office of the Comptroller of the Currency in connection
with the potential future issuance of Class C or Class D preferred securities of Huntington
National Bank on May 18, 2001.
/s/
Deloitte & Touche LLP
Columbus, Ohio
February 21, 2007
30