EXHIBIT 99.1 FOR IMMEDIATE RELEASE STOCKHOLDERS OF SECURITY FINANCIAL BANCORP, INC. APPROVE MERGER WITH STANDARD BANCSHARES, INC. St. John, Indiana, June 12, 2003 - Security Financial Bancorp, Inc. (Nasdaq SmallCap: SFBI), St. John, Indiana, announced today that its stockholders overwhelmingly approved the pending merger with Standard Bancshares, Inc., Hickory Hills, Illinois, at a meeting held on June 10, 2003. The merger is expected to close in the second quarter of 2003, subject to receipt of all regulatory approvals. Security Financial Bancorp, Inc. is the holding company for Security Federal Bank & Trust and is headquartered in St. John, Indiana. Statements contained in this release, which are not historical facts, are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statement are subject to risk and uncertainties, which could cause actual results to differ materially from those currently anticipated due to a number of factors, which include, but are not limited to, factors discussed in documents filed by Security Financial with the Securities and Exchange Commission from time to time. Security Financial does not undertake or intend to update any forward-looking statements. CONTACT: John Nicholas, Investor Relations (219) 365-4344