SecProbe.io

March 27, 2012
 Via E-mail

Mr. A. William Stein Chief Financial Officer & Chief Investment Officer Digital Realty Trust, Inc. 560 Mission Street, Suite 2900 San Francisco, CA 94105

Re: Digital Realty Trust, Inc.
 Digital Realty Trust, L.P.
 Form 10-K for the fiscal ye ar ended Decem ber 31, 2011
 Filed February 28, 2012
File Nos. 001- 32336 and 000-54023

Dear Mr. Stein:
We have reviewed your filing and have the following comments.  In some of our
comments, we may ask you to provide us with  information so we may better understand your
disclosure.
 Please respond to this letter within ten business days by amending your filing, by
providing the requested information, or by advi sing us when you will provide the requested
response.  If you do not believe our comments apply to your fact s and circumstances or do not
believe an amendment is appropriate, pl ease tell us why in your response.

After reviewing any amendment to your filing and the information you provide in
response to these comments, we ma y have additional comments.
 Form 10-K for the Year Ended December 31, 2011

 General

 1. Please advise us whether management consid ers net operating income and/or same store
net operating income as key performance indicat ors.  We may have further comments.
 We urge all persons who are responsible for th e accuracy and adequacy of the disclosure
in the filing to be certain that the filing include s the information the Securities Exchange Act of
1934 and all applicable Exchange Act rules requir e.  Since the company and its management are
in possession of all facts relating to a company’s disclosure, they are responsible for the accuracy
and adequacy of the disclosures they have made.

Mr. A. William Stein Digital Realty Trust, Inc. March 27, 2012 Page 2

  In responding to our comments, please provi de a written statement from the company
acknowledging that:
 the company is responsible for the adequacy an d accuracy of the disclo sure in the filing;

 staff comments or changes to disclosure in response to staff comments do not foreclose
the Commission from taking any action with respect to the filing; and

 the company may not assert staff comments as  a defense in any proceeding initiated by
the Commission or any person under the federa l securities laws of  the United States.

If you have any questions, you may contact Eric McPhee at (202) 551-3693 or me at
(202) 551-3486.
Sincerely,
   /s/ Daniel L. Gordon
Daniel L. Gordon Branch Chief