EXHIBIT 23.3

                    CONSENT TO INDEPENDENT PUBLIC ACCOUNTANTS


We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration  Statement  Form  S-3  of  Iron  Mountain  Incorporated  and to the
incorporation  by reference  therein of our report dated February 21, 1997, with
respect to the  consolidated  statements  of  HIMSCORP,  Inc.  included  in Iron
Mountain Incorporated's Current Report on Form 8-K dated November 25, 1997 filed
with the Securities and Exchange Commission.





                                                              Ernst & Young LLP





Chicago, Illinois
January 5, 1998