Government Properties Income Trust (NYSE: GOV) today announced that the characterization of dividends for 2011 income tax reporting purposes is as follows:

Common Shares

                      Dividend Allocation
Per Share
            Unrecaptured    
Declaration Record Paid/Payable Dividends Ordinary Qualified Capital Section 1250 Return of

Dates

Dates

Dates

Per Share

Income

Dividend

Gain

Gain

Capital

01/05/11 01/26/11 02/23/11 $0.4100 $0.3808 0.000 0.000 0.000 0.0292
04/05/11 04/26/11 05/24/11 $0.4200 $0.3901 0.000 0.000 0.000 0.0299
07/01/11 07/11/11 08/24/11 $0.4200 $0.3901 0.000 0.000 0.000 0.0299
10/06/11 10/27/11 11/22/11 $0.4200 $0.3901 0.000 0.000 0.000 0.0299
TOTALS: $1.6700 $1.5511 0.000 0.000 0.000 0.1189
100.00% 92.88% 0.00% 0.00% 0.00% 7.12%

GOV 's common share CUSIP number is 38376A103. This information represents final income allocations.

Government Properties Income Trust is a real estate investment trust, or REIT, which owns properties leased primarily to the U.S. Government and state governments located throughout the United States. GOV is headquartered in Newton, MA.

A Maryland Real Estate Investment Trust with transferable shares of beneficial interest listed on the New York Stock Exchange.

No shareholder, Trustee or officer is personally liable for any act or obligation of the Trust.

Government Properties Income Trust
Timothy A. Bonang, 617-219-1410
Vice President, Investor Relations
or
Elisabeth A. Heiss, 617-219-1410
Manager, Investor Relations
www.govreit.com