Exhibit 99.1 FOR IMMEDIATE RELEASE BANK CONTACT: PAUL A. MILLER (978) 725-7555 LSB CORPORATION DIVIDEND YIELD 3.30% NORTH ANDOVER, Mass. -- (MARKET WIRE) -- July 29, 2005, LSB Corporation, (NASDAQ - - LSBX), today announced the Board of Directors of LSB Corporation declared a dividend to shareholders on July 28, 2005. The Board voted to pay a cash dividend of $0.14 per share on its outstanding shares of common stock payable on August 25, 2005 to shareholders of record at the close of business on August 11, 2005. This represents a 3.30% dividend yield based on the stock price $16.95 at the close of business on July 28, 2005. LSB Corporation is the parent holding company of its wholly-owned subsidiary Lawrence Savings Bank located in North Andover, Massachusetts, an Equal Housing Lender and Member, FDIC/Depositors Insurance Fund.