Exhibit 23(b)
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-8 of our
reports dated February 25, 2008 relating to the consolidated financial statements of Huntington
Bancshares Incorporated (which report expresses an unqualified opinion and includes an explanatory
paragraph related to the adoption of Statement of Financial Accounting Standards (SFAS)
No. 123(R), Share-Based Payment, SFAS No. 156, Accounting for Servicing of Financial Assets, and
SFAS No. 158, Employers Accounting for Defined Benefit Pension and Other Postretirement Plans, in
2006), and the effectiveness of Huntington Bancshares Incorporateds internal control over
financial reporting, incorporated by reference in the Annual Report on Form 10-K of Huntington
Bancshares Incorporated for the year ended December 31, 2007.
/s/ Deloitte & Touche LLP
Columbus, Ohio
September 17, 2008