Exhibit 99.1


                             WSB HOLDING COMPANY
                               REVOCABLE PROXY
                       Special Meeting of Stockholders
                                August __, 2001

         This Proxy is solicited on behalf of the Board of Directors.

     The undersigned, as a holder of common stock of WSB Holding Company
("WSB"), hereby appoints the Board of Directors of WSB, or any successors
thereto, as proxies, with full powers of substitution, to represent and to vote
all of the shares of common stock of WSB which the undersigned is entitled to
vote at the Special Meeting of Stockholders of WSB to be held at the branch
office of Workingmens Bank located at 5035 Curry Road, Pittsburgh, Pennsylvania
on ___day, August __, 2001 at __:__  .m., eastern time, or any adjournment
thereof.

     This Proxy may be revoked at any time before it is exercised.

     Shares of Common Stock of WSB will be voted as specified. Unless otherwise
specified, this Proxy will be voted FOR the proposal to adopt the Agreement and
Plan of Reorganization, dated as of May 16, 2001, by and between ESB Financial
Corporation and WSB. If any other matter is properly presented at the Special
Meeting of Stockholders, the Proxy will be voted in accordance with the judgment
of the persons appointed as Proxies.

     IMPORTANT: PLEASE DATE AND SIGN THE PROXY ON REVERSE SIDE.


          PLEASE MARK YOUR CHOICE LIKE THIS [X] IN BLUE OR BLACK INK

                                                          ----------------------

                                                           I plan to attend the
                                                           meeting

                                                                    [_]

                                                          ----------------------


1.   Proposal to adopt an Agreement and Plan of Reorganization, dated as of May
16, 2001, by and between ESB Financial Corporation ("ESB") and WSB Holding
Company ("WSB"), and a related Agreement of Merger (together, the
"Reorganization Agreement"), pursuant to which WSB will merge into ESB and each
outstanding share of common stock of WSB, will be converted into the right to
receive $17.10 in cash or common stock of ESB at the election of the holder,
subject to the election, allocation and proration procedures set forth in the
Reorganization Agreement.




               FOR                AGAINST               ABSTAIN
               ---                -------               -------
             [_]                [_]                   [_]



2.   In their discretion, upon any other matter that may properly come before
the Special Meeting of Stockholders or any adjournments thereof.


     The Board of Directors of WSB recommends a vote FOR approval of the
Reorganization Agreement. Such votes are hereby solicited by the Board of
Directors of WSB.


                         Dated:  ________________________________, 2001

                         Signature __________________________________________

                         Signature __________________________________________
                                                 (print name)

                         Important: Please sign your name exactly as it appears
                         hereon. When shares are held as joint tenants, either
                         may sign. When signing as an attorney, executor,
                         administrator, trustee or guardian, add such title to
                         your signature.


                         Note: If you receive more than one proxy card, please
                         date and sign each card and return all proxy cards in
                         the enclosed envelope.