For Further Information Contact: J. Gerald Bazewicz President and Chief Executive Officer (570) 752-3671 Exhibit 99.1 PRESS RELEASE FIRST KEYSTONE CORPORATION ANNOUNCES SECOND QUARTER DIVIDEND Berwick, Pennsylvania - May 31, 2006 - First Keystone Corporation (OTC BB: FKYS), parent company of The First National Bank of Berwick, declared a $.22 per share quarterly cash dividend to shareholders of record as of June 13, 2006, payable June 30, 2006. This represents a 10.0% increase in the second quarter dividend over the $.20 per share paid in June 2005. Total cash dividends for the first two quarters of 2006 amounts to $.44 per share as compared to $.40 for the first two quarters of 2005, an increase of 10.0%. The First National Bank of Berwick now operates 10 full service offices in Columbia (5), Luzerne (4), and Montour (1) Counties providing banking and trust services. Inquiries regarding the purchase of the company's stock may be made through the following brokers: Legg Mason Wood Walker, Inc., 800-888-6673; Janney Montgomery Scott, Inc., 800-526-6397; Ferris, Baker, Watts, Inc., 800-638-7411; Ryan, Beck and Company, 800-223-8969; and Boenning & Scattergood, Inc., 800-883-8383. Note: This press release may contain forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Actual results and trends could differ materially from those set forth in such statements due to various factors. These factors include operating, legal and regulatory risks; changing economic and competitive conditions and other risks and uncertainties. For more information on The First National Bank of Berwick or its parent company, First Keystone Corporation, please contact J. Gerald Bazewicz at 570-752-3671, extension 172. -5-