EXHIBIT 23 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 33-43001, 33-49234, 333-27613, 333-95725, 333-31464, 333-31379 and 333-61002 and Form S-3 No. 333-101514) of ESB Financial Corporation, of our report dated January 27, 2003, with respect to the consolidated financial statements of ESB Financial Corporation and subsidiaries incorporated by reference in this Annual Report (Form 10-K) for the year ended December 31, 2002. /s/ ERNST & YOUNG LLP Pittsburgh, Pennsylvania March 21, 2003