Martin Marietta Materials, Inc. Declares Regular Quarterly Cash Dividend

RALEIGH, North Carolina (November 16, 2006) - Anne H. Lloyd, Senior Vice President, Chief Financial Officer and Treasurer of Martin Marietta Materials, Inc. (NYSE:MLM), today announced that the Board of Directors has declared a regular quarterly cash dividend of $0.275 (twenty-seven and one-half cents) per share on the Corporation's common stock. This dividend, which represents a cash dividend of $1.10 per share on an annualized basis, is payable December 29, 2006, to shareholders of record at the close of business on December 1, 2006

Martin Marietta is the nation's second largest producer of construction aggregates, a leading producer of magnesia-based chemical products and is developing structural composites products for use in a wide variety of industries.