WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                       Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported): April 30, 2003

                           IRON MOUNTAIN INCORPORATED
             (Exact name of registrant as specified in its charter)

                 (State or other jurisdiction of incorporation)

          1-13045                                    23-2588479
 (Commission File Number)                (IRS Employer Identification No.)

                               745 Atlantic Avenue
                           Boston, Massachusetts 02111
          (Address of principal executive offices, including zip code)

                                 (617) 535-4766
              (Registrant's telephone number, including area code)

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

(c) Exhibits

Iron  Mountain  Incorporated  (the  "Company")  hereby  furnishes  the following

               99.1          Press release dated April 30, 2003.

Item 9.  Regulation FD Disclosure.

The  following  information  is  furnished  pursuant  to Item  12,  "Results  of
Operations and Financial  Condition" in accordance with SEC Release No. 33-8216.
This  information  shall not be deemed "filed" for purposes of Section 18 of the
Securities   Exchange  Act  of  1934,  as  amended  (the  "Exchange   Act"),  or
incorporated  by reference in any filing under the  Securities  Act of 1933,  as
amended, or the Exchange Act, except as shall be expressly set forth by specific
reference in such a filing.

On April  30,  2003,  the  Company  issued a press  release  setting  forth  the
Company's  results of operations  and  financial  condition for its first fiscal
quarter ended March 31, 2003. A copy of the Company's  press release is attached
hereto as Exhibit 99.1 and is incorporated herein by reference.


               Pursuant to the  requirements  of the Securities  Exchange Act of
1934,  the  Registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.

                                      IRON MOUNTAIN INCORPORATED

                                      By: /s/ Jean Bua
                                          Name:  Jean Bua
                                          Title: Vice President and
                                                 Corporate Controller

Date: April 30, 2003