Exhibit 23.1 Consent of Independent Auditors We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) and related Prospectus of Sovereign Bancorp, Inc. and to the incorporation by reference therein of our report date February 5, 2001, except for Note 26, as to which the date is March 1, 2001, with respect to the consolidated financial statements of Sovereign Bancorp, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 2000, filed with the Securities and Exchange Commission. /s/ Ernst & Young, LLP Philadelphia, Pennsylvania October 10, 2001