Corporate Office Properties Trust Declares First Quarter 2011 Dividends

Corporate Office Properties Trust (COPT) OFC announced today that its Board of Trustees has declared a quarterly dividend of $0.4125 per Common Share of beneficial interest for the first quarter 2011. The dividend will be paid on April 15, 2011 to shareholders of record on March 31, 2011. The Board of Trustees declared a dividend for the period commencing January 15, 2011 and ending April 14, 2011 of $0.50 per Series G Cumulative Redeemable Preferred Share of beneficial interest of the Company, payable on April 15, 2011 to shareholders of record on March 31, 2011. The Board of Trustees declared a dividend for the period commencing January 15, 2011 and ending April 14, 2011 of $0.4688 per Series H Cumulative Redeemable Preferred Share of beneficial interest of the Company, payable on April 15, 2011 to shareholders of record on March 31, 2011. The Board of Trustees declared a dividend for the period commencing January 15, 2011 and ending April 14, 2011 of $0.4766 per Series J Cumulative Redeemable Preferred Share of beneficial interest of the Company, payable on April 15, 2011 to shareholders of record on March 31, 2011. The Board of Trustees declared a dividend for the period commencing January 15, 2011 and ending April 14, 2011 of $0.70 per Series K Cumulative Redeemable Convertible Preferred Share of beneficial interest of the Company, payable on April 15, 2011 to shareholders of record on March 31, 2011.